options.c

   1 /*
   2  * Command-line (and received via daemon-socket) option parsing.
   3  *
   4  * Copyright (C) 1998-2001 Andrew Tridgell <tridge@samba.org>
   5  * Copyright (C) 2000, 2001, 2002 Martin Pool <mbp@samba.org>
   6  * Copyright (C) 2002-2020 Wayne Davison
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 3 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License along
  19  * with this program; if not, visit the http://fsf.org website.
  20  */
  21
  22 #include "rsync.h"
  23 #include "itypes.h"
  24 #include "latest-year.h"
  25 #include <popt.h>
  26 #include <zlib.h>
  27
  28 extern int module_id;
  29 extern int local_server;
  30 extern int sanitize_paths;
  31 extern int daemon_over_rsh;
  32 extern unsigned int module_dirlen;
  33 extern filter_rule_list filter_list;
  34 extern filter_rule_list daemon_filter_list;
  35
  36 #define NOT_SPECIFIED (-42)
  37
  38 int make_backups = 0;
  39
  40 /**
  41  * If 1, send the whole file as literal data rather than trying to
  42  * create an incremental diff.
  43  *
  44  * If -1, then look at whether we're local or remote and go by that.
  45  *
  46  * @sa disable_deltas_p()
  47  **/
  48 int whole_file = -1;
  49
  50 int append_mode = 0;
  51 int keep_dirlinks = 0;
  52 int copy_dirlinks = 0;
  53 int copy_links = 0;
  54 int write_devices = 0;
  55 int preserve_links = 0;
  56 int preserve_hard_links = 0;
  57 int preserve_acls = 0;
  58 int preserve_xattrs = 0;
  59 int preserve_perms = 0;
  60 int preserve_executability = 0;
  61 int preserve_devices = 0;
  62 int preserve_specials = 0;
  63 int preserve_uid = 0;
  64 int preserve_gid = 0;
  65 int preserve_times = 0;
  66 int update_only = 0;
  67 int cvs_exclude = 0;
  68 int dry_run = 0;
  69 int do_xfers = 1;
  70 int ignore_times = 0;
  71 int delete_mode = 0;
  72 int delete_during = 0;
  73 int delete_before = 0;
  74 int delete_after = 0;
  75 int delete_excluded = 0;
  76 int remove_source_files = 0;
  77 int one_file_system = 0;
  78 int protocol_version = PROTOCOL_VERSION;
  79 int sparse_files = 0;
  80 int preallocate_files = 0;
  81 int do_compression = 0;
  82 int def_compress_level = NOT_SPECIFIED;
  83 int am_root = 0; /* 0 = normal, 1 = root, 2 = --super, -1 = --fake-super */
  84 int am_server = 0;
  85 int am_sender = 0;
  86 int am_starting_up = 1;
  87 int relative_paths = -1;
  88 int implied_dirs = 1;
  89 int missing_args = 0; /* 0 = FERROR_XFER, 1 = ignore, 2 = delete */
  90 int numeric_ids = 0;
  91 int msgs2stderr = 0;
  92 int allow_8bit_chars = 0;
  93 int force_delete = 0;
  94 int io_timeout = 0;
  95 int prune_empty_dirs = 0;
  96 int use_qsort = 0;
  97 char *files_from = NULL;
  98 int filesfrom_fd = -1;
  99 char *filesfrom_host = NULL;
 100 int eol_nulls = 0;
 101 int protect_args = -1;
 102 int human_readable = 1;
 103 int recurse = 0;
 104 int allow_inc_recurse = 1;
 105 int xfer_dirs = -1;
 106 int am_daemon = 0;
 107 int connect_timeout = 0;
 108 int keep_partial = 0;
 109 int safe_symlinks = 0;
 110 int copy_unsafe_links = 0;
 111 int munge_symlinks = 0;
 112 int size_only = 0;
 113 int daemon_bwlimit = 0;
 114 int bwlimit = 0;
 115 int fuzzy_basis = 0;
 116 size_t bwlimit_writemax = 0;
 117 int ignore_existing = 0;
 118 int ignore_non_existing = 0;
 119 int need_messages_from_generator = 0;
 120 int max_delete = INT_MIN;
 121 OFF_T max_size = -1;
 122 OFF_T min_size = -1;
 123 int ignore_errors = 0;
 124 int modify_window = 0;
 125 int blocking_io = -1;
 126 int checksum_seed = 0;
 127 int inplace = 0;
 128 int delay_updates = 0;
 129 long block_size = 0; /* "long" because popt can't set an int32. */
 130 char *skip_compress = NULL;
 131 char *copy_as = NULL;
 132 item_list dparam_list = EMPTY_ITEM_LIST;
 133
 134 /** Network address family. **/
 135 int default_af_hint
 136 #ifdef INET6
 137         = 0;            /* Any protocol */
 138 #else
 139         = AF_INET;      /* Must use IPv4 */
 140 # ifdef AF_INET6
 141 #  undef AF_INET6
 142 # endif
 143 # define AF_INET6 AF_INET /* make -6 option a no-op */
 144 #endif
 145
 146 /** Do not go into the background when run as --daemon.  Good
 147  * for debugging and required for running as a service on W32,
 148  * or under Unix process-monitors. **/
 149 int no_detach
 150 #if defined _WIN32 || defined __WIN32__
 151         = 1;
 152 #else
 153         = 0;
 154 #endif
 155
 156 int write_batch = 0;
 157 int read_batch = 0;
 158 int backup_dir_len = 0;
 159 int backup_suffix_len;
 160 unsigned int backup_dir_remainder;
 161
 162 char *backup_suffix = NULL;
 163 char *tmpdir = NULL;
 164 char *partial_dir = NULL;
 165 char *basis_dir[MAX_BASIS_DIRS+1];
 166 char *config_file = NULL;
 167 char *shell_cmd = NULL;
 168 char *logfile_name = NULL;
 169 char *logfile_format = NULL;
 170 char *stdout_format = NULL;
 171 char *password_file = NULL;
 172 char *rsync_path = RSYNC_PATH;
 173 char *backup_dir = NULL;
 174 char backup_dir_buf[MAXPATHLEN];
 175 char *sockopts = NULL;
 176 char *usermap = NULL;
 177 char *groupmap = NULL;
 178 int rsync_port = 0;
 179 int compare_dest = 0;
 180 int copy_dest = 0;
 181 int link_dest = 0;
 182 int basis_dir_cnt = 0;
 183 char *dest_option = NULL;
 184
 185 static int remote_option_alloc = 0;
 186 int remote_option_cnt = 0;
 187 const char **remote_options = NULL;
 188 const char *checksum_choice = NULL;
 189
 190 int quiet = 0;
 191 int output_motd = 1;
 192 int log_before_transfer = 0;
 193 int stdout_format_has_i = 0;
 194 int stdout_format_has_o_or_i = 0;
 195 int logfile_format_has_i = 0;
 196 int logfile_format_has_o_or_i = 0;
 197 int always_checksum = 0;
 198 int list_only = 0;
 199
 200 #define MAX_BATCH_NAME_LEN 256  /* Must be less than MAXPATHLEN-13 */
 201 char *batch_name = NULL;
 202
 203 int need_unsorted_flist = 0;
 204 #ifdef ICONV_OPTION
 205 char *iconv_opt = ICONV_OPTION;
 206 #endif
 207
 208 struct chmod_mode_struct *chmod_modes = NULL;
 209
 210 static const char *debug_verbosity[] = {
 211         /*0*/ NULL,
 212         /*1*/ NULL,
 213         /*2*/ "BIND,CMD,CONNECT,DEL,DELTASUM,DUP,FILTER,FLIST,ICONV",
 214         /*3*/ "ACL,BACKUP,CONNECT2,DELTASUM2,DEL2,EXIT,FILTER2,FLIST2,FUZZY,GENR,OWN,RECV,SEND,TIME",
 215         /*4*/ "CMD2,DELTASUM3,DEL3,EXIT2,FLIST3,ICONV2,OWN2,PROTO,TIME2",
 216         /*5*/ "CHDIR,DELTASUM4,FLIST4,FUZZY2,HASH,HLINK",
 217 };
 218
 219 #define MAX_VERBOSITY ((int)(sizeof debug_verbosity / sizeof debug_verbosity[0]) - 1)
 220
 221 static const char *info_verbosity[1+MAX_VERBOSITY] = {
 222         /*0*/ NULL,
 223         /*1*/ "COPY,DEL,FLIST,MISC,NAME,STATS,SYMSAFE",
 224         /*2*/ "BACKUP,MISC2,MOUNT,NAME2,REMOVE,SKIP",
 225 };
 226
 227 #define MAX_OUT_LEVEL 4 /* The largest N allowed for any flagN word. */
 228
 229 short info_levels[COUNT_INFO], debug_levels[COUNT_DEBUG];
 230
 231 #define DEFAULT_PRIORITY 0      /* Default/implied/--verbose set values. */
 232 #define HELP_PRIORITY 1         /* The help output uses this level. */
 233 #define USER_PRIORITY 2         /* User-specified via --info or --debug */
 234 #define LIMIT_PRIORITY 3        /* Overriding priority when limiting values. */
 235
 236 #define W_CLI (1<<0)    /* client side */
 237 #define W_SRV (1<<1)    /* server side */
 238 #define W_SND (1<<2)    /* sending side */
 239 #define W_REC (1<<3)    /* receiving side */
 240
 241 struct output_struct {
 242         char *name;     /* The name of the info/debug flag. */
 243         char *help;     /* The description of the info/debug flag. */
 244         uchar namelen;  /* The length of the name string. */
 245         uchar flag;     /* The flag's value, for consistency check. */
 246         uchar where;    /* Bits indicating where the flag is used. */
 247         uchar priority; /* See *_PRIORITY defines. */
 248 };
 249
 250 #define INFO_WORD(flag, where, help) { #flag, help, sizeof #flag - 1, INFO_##flag, where, 0 }
 251
 252 static struct output_struct info_words[COUNT_INFO+1] = {
 253         INFO_WORD(BACKUP, W_REC, "Mention files backed up"),
 254         INFO_WORD(COPY, W_REC, "Mention files copied locally on the receiving side"),
 255         INFO_WORD(DEL, W_REC, "Mention deletions on the receiving side"),
 256         INFO_WORD(FLIST, W_CLI, "Mention file-list receiving/sending (levels 1-2)"),
 257         INFO_WORD(MISC, W_SND|W_REC, "Mention miscellaneous information (levels 1-2)"),
 258         INFO_WORD(MOUNT, W_SND|W_REC, "Mention mounts that were found or skipped"),
 259         INFO_WORD(NAME, W_SND|W_REC, "Mention 1) updated file/dir names, 2) unchanged names"),
 260         INFO_WORD(PROGRESS, W_CLI, "Mention 1) per-file progress or 2) total transfer progress"),
 261         INFO_WORD(REMOVE, W_SND, "Mention files removed on the sending side"),
 262         INFO_WORD(SKIP, W_REC, "Mention files that are skipped due to options used"),
 263         INFO_WORD(STATS, W_CLI|W_SRV, "Mention statistics at end of run (levels 1-3)"),
 264         INFO_WORD(SYMSAFE, W_SND|W_REC, "Mention symlinks that are unsafe"),
 265         { NULL, "--info", 0, 0, 0, 0 }
 266 };
 267
 268 #define DEBUG_WORD(flag, where, help) { #flag, help, sizeof #flag - 1, DEBUG_##flag, where, 0 }
 269
 270 static struct output_struct debug_words[COUNT_DEBUG+1] = {
 271         DEBUG_WORD(ACL, W_SND|W_REC, "Debug extra ACL info"),
 272         DEBUG_WORD(BACKUP, W_REC, "Debug backup actions (levels 1-2)"),
 273         DEBUG_WORD(BIND, W_CLI, "Debug socket bind actions"),
 274         DEBUG_WORD(CHDIR, W_CLI|W_SRV, "Debug when the current directory changes"),
 275         DEBUG_WORD(CONNECT, W_CLI, "Debug connection events (levels 1-2)"),
 276         DEBUG_WORD(CMD, W_CLI, "Debug commands+options that are issued (levels 1-2)"),
 277         DEBUG_WORD(DEL, W_REC, "Debug delete actions (levels 1-3)"),
 278         DEBUG_WORD(DELTASUM, W_SND|W_REC, "Debug delta-transfer checksumming (levels 1-4)"),
 279         DEBUG_WORD(DUP, W_REC, "Debug weeding of duplicate names"),
 280         DEBUG_WORD(EXIT, W_CLI|W_SRV, "Debug exit events (levels 1-3)"),
 281         DEBUG_WORD(FILTER, W_SND|W_REC, "Debug filter actions (levels 1-2)"),
 282         DEBUG_WORD(FLIST, W_SND|W_REC, "Debug file-list operations (levels 1-4)"),
 283         DEBUG_WORD(FUZZY, W_REC, "Debug fuzzy scoring (levels 1-2)"),
 284         DEBUG_WORD(GENR, W_REC, "Debug generator functions"),
 285         DEBUG_WORD(HASH, W_SND|W_REC, "Debug hashtable code"),
 286         DEBUG_WORD(HLINK, W_SND|W_REC, "Debug hard-link actions (levels 1-3)"),
 287         DEBUG_WORD(ICONV, W_CLI|W_SRV, "Debug iconv character conversions (levels 1-2)"),
 288         DEBUG_WORD(IO, W_CLI|W_SRV, "Debug I/O routines (levels 1-4)"),
 289         DEBUG_WORD(OWN, W_REC, "Debug ownership changes in users & groups (levels 1-2)"),
 290         DEBUG_WORD(PROTO, W_CLI|W_SRV, "Debug protocol information"),
 291         DEBUG_WORD(RECV, W_REC, "Debug receiver functions"),
 292         DEBUG_WORD(SEND, W_SND, "Debug sender functions"),
 293         DEBUG_WORD(TIME, W_REC, "Debug setting of modified times (levels 1-2)"),
 294         { NULL, "--debug", 0, 0, 0, 0 }
 295 };
 296
 297 static int verbose = 0;
 298 static int do_stats = 0;
 299 static int do_progress = 0;
 300 static int daemon_opt;   /* sets am_daemon after option error-reporting */
 301 static int omit_dir_times = 0;
 302 static int omit_link_times = 0;
 303 static int F_option_cnt = 0;
 304 static int modify_window_set;
 305 static int itemize_changes = 0;
 306 static int refused_delete, refused_archive_part, refused_compress;
 307 static int refused_partial, refused_progress, refused_delete_before;
 308 static int refused_delete_during;
 309 static int refused_inplace, refused_no_iconv;
 310 static BOOL usermap_via_chown, groupmap_via_chown;
 311 #ifdef HAVE_SETVBUF
 312 static char *outbuf_mode;
 313 #endif
 314 static char *bwlimit_arg, *max_size_arg, *min_size_arg;
 315 static char tmp_partialdir[] = ".~tmp~";
 316
 317 /** Local address to bind.  As a character string because it's
 318  * interpreted by the IPv6 layer: should be a numeric IP4 or IP6
 319  * address, or a hostname. **/
 320 char *bind_address;
 321
 322 static void output_item_help(struct output_struct *words);
 323
 324 /* This constructs a string that represents all the options set for either
 325  * the --info or --debug setting, skipping any implied options (by -v, etc.).
 326  * This is used both when conveying the user's options to the server, and
 327  * when the help output wants to tell the user what options are implied. */
 328 static char *make_output_option(struct output_struct *words, short *levels, uchar where)
 329 {
 330         char *str = words == info_words ? "--info=" : "--debug=";
 331         int j, counts[MAX_OUT_LEVEL+1], pos, skipped = 0, len = 0, max = 0, lev = 0;
 332         int word_count = words == info_words ? COUNT_INFO : COUNT_DEBUG;
 333         char *buf;
 334
 335         memset(counts, 0, sizeof counts);
 336
 337         for (j = 0; words[j].name; j++) {
 338                 if (words[j].flag != j) {
 339                         rprintf(FERROR, "rsync: internal error on %s%s: %d != %d\n",
 340                                 words == info_words ? "INFO_" : "DEBUG_",
 341                                 words[j].name, words[j].flag, j);
 342                         exit_cleanup(RERR_UNSUPPORTED);
 343                 }
 344                 if (!(words[j].where & where))
 345                         continue;
 346                 if (words[j].priority == DEFAULT_PRIORITY) {
 347                         /* Implied items don't need to be mentioned. */
 348                         skipped++;
 349                         continue;
 350                 }
 351                 len += len ? 1 : strlen(str);
 352                 len += strlen(words[j].name);
 353                 len += levels[j] == 1 ? 0 : 1;
 354
 355                 if (words[j].priority == HELP_PRIORITY)
 356                         continue; /* no abbreviating for help */
 357
 358                 assert(levels[j] <= MAX_OUT_LEVEL);
 359                 if (++counts[levels[j]] > max) {
 360                         /* Determine which level has the most items. */
 361                         lev = levels[j];
 362                         max = counts[lev];
 363                 }
 364         }
 365
 366         /* Sanity check the COUNT_* define against the length of the table. */
 367         if (j != word_count) {
 368                 rprintf(FERROR, "rsync: internal error: %s is wrong! (%d != %d)\n",
 369                         words == info_words ? "COUNT_INFO" : "COUNT_DEBUG",
 370                         j, word_count);
 371                 exit_cleanup(RERR_UNSUPPORTED);
 372         }
 373
 374         if (!len)
 375                 return NULL;
 376
 377         len++;
 378         if (!(buf = new_array(char, len)))
 379                 out_of_memory("make_output_option");
 380         pos = 0;
 381
 382         if (skipped || max < 5)
 383                 lev = -1;
 384         else {
 385                 if (lev == 0)
 386                         pos += snprintf(buf, len, "%sNONE", str);
 387                 else if (lev == 1)
 388                         pos += snprintf(buf, len, "%sALL", str);
 389                 else
 390                         pos += snprintf(buf, len, "%sALL%d", str, lev);
 391         }
 392
 393         for (j = 0; words[j].name && pos < len; j++) {
 394                 if (words[j].priority == DEFAULT_PRIORITY || levels[j] == lev || !(words[j].where & where))
 395                         continue;
 396                 if (pos)
 397                         buf[pos++] = ',';
 398                 else
 399                         pos += strlcpy(buf+pos, str, len-pos);
 400                 if (pos < len)
 401                         pos += strlcpy(buf+pos, words[j].name, len-pos);
 402                 /* Level 1 is implied by the name alone. */
 403                 if (levels[j] != 1 && pos < len)
 404                         buf[pos++] = '0' + levels[j];
 405         }
 406
 407         buf[pos] = '\0';
 408
 409         return buf;
 410 }
 411
 412 static void parse_output_words(struct output_struct *words, short *levels,
 413                                const char *str, uchar priority)
 414 {
 415         const char *s;
 416         int j, len, lev;
 417
 418         for ( ; str; str = s) {
 419                 if ((s = strchr(str, ',')) != NULL)
 420                         len = s++ - str;
 421                 else
 422                         len = strlen(str);
 423                 if (!len)
 424                         continue;
 425                 if (!isDigit(str)) {
 426                         while (len && isDigit(str+len-1))
 427                                 len--;
 428                 }
 429                 lev = isDigit(str+len) ? atoi(str+len) : 1;
 430                 if (lev > MAX_OUT_LEVEL)
 431                         lev = MAX_OUT_LEVEL;
 432                 if (len == 4 && strncasecmp(str, "help", 4) == 0) {
 433                         output_item_help(words);
 434                         exit_cleanup(0);
 435                 }
 436                 if (len == 4 && strncasecmp(str, "none", 4) == 0)
 437                         len = lev = 0;
 438                 else if (len == 3 && strncasecmp(str, "all", 3) == 0)
 439                         len = 0;
 440                 for (j = 0; words[j].name; j++) {
 441                         if (!len
 442                          || (len == words[j].namelen && strncasecmp(str, words[j].name, len) == 0)) {
 443                                 if (priority >= words[j].priority) {
 444                                         words[j].priority = priority;
 445                                         levels[j] = lev;
 446                                 }
 447                                 if (len)
 448                                         break;
 449                         }
 450                 }
 451                 if (len && !words[j].name) {
 452                         rprintf(FERROR, "Unknown %s item: \"%.*s\"\n",
 453                                 words[j].help, len, str);
 454                         exit_cleanup(RERR_SYNTAX);
 455                 }
 456         }
 457 }
 458
 459 /* Tell the user what all the info or debug flags mean. */
 460 static void output_item_help(struct output_struct *words)
 461 {
 462         short *levels = words == info_words ? info_levels : debug_levels;
 463         const char **verbosity = words == info_words ? info_verbosity : debug_verbosity;
 464         char buf[128], *opt, *fmt = "%-10s %s\n";
 465         int j;
 466
 467         reset_output_levels();
 468
 469         rprintf(FINFO, "Use OPT or OPT1 for level 1 output, OPT2 for level 2, etc.; OPT0 silences.\n");
 470         rprintf(FINFO, "\n");
 471         for (j = 0; words[j].name; j++)
 472                 rprintf(FINFO, fmt, words[j].name, words[j].help);
 473         rprintf(FINFO, "\n");
 474
 475         snprintf(buf, sizeof buf, "Set all %s options (e.g. all%d)",
 476                  words[j].help, MAX_OUT_LEVEL);
 477         rprintf(FINFO, fmt, "ALL", buf);
 478
 479         snprintf(buf, sizeof buf, "Silence all %s options (same as all0)",
 480                  words[j].help);
 481         rprintf(FINFO, fmt, "NONE", buf);
 482
 483         rprintf(FINFO, fmt, "HELP", "Output this help message");
 484         rprintf(FINFO, "\n");
 485         rprintf(FINFO, "Options added for each increase in verbose level:\n");
 486
 487         for (j = 1; j <= MAX_VERBOSITY; j++) {
 488                 parse_output_words(words, levels, verbosity[j], HELP_PRIORITY);
 489                 opt = make_output_option(words, levels, W_CLI|W_SRV|W_SND|W_REC);
 490                 if (opt) {
 491                         rprintf(FINFO, "%d) %s\n", j, strchr(opt, '=')+1);
 492                         free(opt);
 493                 }
 494                 reset_output_levels();
 495         }
 496 }
 497
 498 /* The --verbose option now sets info+debug flags. */
 499 static void set_output_verbosity(int level, uchar priority)
 500 {
 501         int j;
 502
 503         if (level > MAX_VERBOSITY)
 504                 level = MAX_VERBOSITY;
 505
 506         for (j = 1; j <= level; j++) {
 507                 parse_output_words(info_words, info_levels, info_verbosity[j], priority);
 508                 parse_output_words(debug_words, debug_levels, debug_verbosity[j], priority);
 509         }
 510 }
 511
 512 /* Limit the info+debug flag levels given a verbose-option level limit. */
 513 void limit_output_verbosity(int level)
 514 {
 515         short info_limits[COUNT_INFO], debug_limits[COUNT_DEBUG];
 516         int j;
 517
 518         if (level > MAX_VERBOSITY)
 519                 return;
 520
 521         memset(info_limits, 0, sizeof info_limits);
 522         memset(debug_limits, 0, sizeof debug_limits);
 523
 524         /* Compute the level limits in the above arrays. */
 525         for (j = 1; j <= level; j++) {
 526                 parse_output_words(info_words, info_limits, info_verbosity[j], LIMIT_PRIORITY);
 527                 parse_output_words(debug_words, debug_limits, debug_verbosity[j], LIMIT_PRIORITY);
 528         }
 529
 530         for (j = 0; j < COUNT_INFO; j++) {
 531                 if (info_levels[j] > info_limits[j])
 532                         info_levels[j] = info_limits[j];
 533         }
 534
 535         for (j = 0; j < COUNT_DEBUG; j++) {
 536                 if (debug_levels[j] > debug_limits[j])
 537                         debug_levels[j] = debug_limits[j];
 538         }
 539 }
 540
 541 void reset_output_levels(void)
 542 {
 543         int j;
 544
 545         memset(info_levels, 0, sizeof info_levels);
 546         memset(debug_levels, 0, sizeof debug_levels);
 547
 548         for (j = 0; j < COUNT_INFO; j++)
 549                 info_words[j].priority = DEFAULT_PRIORITY;
 550
 551         for (j = 0; j < COUNT_DEBUG; j++)
 552                 debug_words[j].priority = DEFAULT_PRIORITY;
 553 }
 554
 555 void negate_output_levels(void)
 556 {
 557         int j;
 558
 559         for (j = 0; j < COUNT_INFO; j++)
 560                 info_levels[j] *= -1;
 561
 562         for (j = 0; j < COUNT_DEBUG; j++)
 563                 debug_levels[j] *= -1;
 564 }
 565
 566 static void print_rsync_version(enum logcode f)
 567 {
 568         char *subprotocol = "";
 569         char const *got_socketpair = "no ";
 570         char const *have_inplace = "no ";
 571         char const *hardlinks = "no ";
 572         char const *prealloc = "no ";
 573         char const *symtimes = "no ";
 574         char const *acls = "no ";
 575         char const *xattrs = "no ";
 576         char const *links = "no ";
 577         char const *iconv = "no ";
 578         char const *ipv6 = "no ";
 579         STRUCT_STAT *dumstat;
 580
 581 #if SUBPROTOCOL_VERSION != 0
 582         if (asprintf(&subprotocol, ".PR%d", SUBPROTOCOL_VERSION) < 0)
 583                 out_of_memory("print_rsync_version");
 584 #endif
 585 #ifdef HAVE_SOCKETPAIR
 586         got_socketpair = "";
 587 #endif
 588 #ifdef HAVE_FTRUNCATE
 589         have_inplace = "";
 590 #endif
 591 #ifdef SUPPORT_HARD_LINKS
 592         hardlinks = "";
 593 #endif
 594 #ifdef SUPPORT_PREALLOCATION
 595         prealloc = "";
 596 #endif
 597 #ifdef SUPPORT_ACLS
 598         acls = "";
 599 #endif
 600 #ifdef SUPPORT_XATTRS
 601         xattrs = "";
 602 #endif
 603 #ifdef SUPPORT_LINKS
 604         links = "";
 605 #endif
 606 #ifdef INET6
 607         ipv6 = "";
 608 #endif
 609 #ifdef ICONV_OPTION
 610         iconv = "";
 611 #endif
 612 #ifdef CAN_SET_SYMLINK_TIMES
 613         symtimes = "";
 614 #endif
 615
 616         rprintf(f, "%s  version %s  protocol version %d%s\n",
 617                 RSYNC_NAME, RSYNC_VERSION, PROTOCOL_VERSION, subprotocol);
 618         rprintf(f, "Copyright (C) 1996-" LATEST_YEAR " by Andrew Tridgell, Wayne Davison, and others.\n");
 619         rprintf(f, "Web site: http://rsync.samba.org/\n");
 620         rprintf(f, "Capabilities:\n");
 621         rprintf(f, "    %d-bit files, %d-bit inums, %d-bit timestamps, %d-bit long ints,\n",
 622                 (int)(sizeof (OFF_T) * 8),
 623                 (int)(sizeof dumstat->st_ino * 8), /* Don't check ino_t! */
 624                 (int)(sizeof (time_t) * 8),
 625                 (int)(sizeof (int64) * 8));
 626         rprintf(f, "    %ssocketpairs, %shardlinks, %ssymlinks, %sIPv6, batchfiles, %sinplace,\n",
 627                 got_socketpair, hardlinks, links, ipv6, have_inplace);
 628         rprintf(f, "    %sappend, %sACLs, %sxattrs, %siconv, %ssymtimes, %sprealloc\n",
 629                 have_inplace, acls, xattrs, iconv, symtimes, prealloc);
 630
 631 #ifdef MAINTAINER_MODE
 632         rprintf(f, "Panic Action: \"%s\"\n", get_panic_action());
 633 #endif
 634
 635 #if SIZEOF_INT64 < 8
 636         rprintf(f, "WARNING: no 64-bit integers on this platform!\n");
 637 #endif
 638         if (sizeof (int64) != SIZEOF_INT64) {
 639                 rprintf(f,
 640                         "WARNING: size mismatch in SIZEOF_INT64 define (%d != %d)\n",
 641                         (int) SIZEOF_INT64, (int) sizeof (int64));
 642         }
 643
 644         rprintf(f,"\n");
 645         rprintf(f,"rsync comes with ABSOLUTELY NO WARRANTY.  This is free software, and you\n");
 646         rprintf(f,"are welcome to redistribute it under certain conditions.  See the GNU\n");
 647         rprintf(f,"General Public Licence for details.\n");
 648 }
 649
 650
 651 void usage(enum logcode F)
 652 {
 653   print_rsync_version(F);
 654
 655   rprintf(F,"\n");
 656   rprintf(F,"rsync is a file transfer program capable of efficient remote update\n");
 657   rprintf(F,"via a fast differencing algorithm.\n");
 658
 659   rprintf(F,"\n");
 660   rprintf(F,"Usage: rsync [OPTION]... SRC [SRC]... DEST\n");
 661   rprintf(F,"  or   rsync [OPTION]... SRC [SRC]... [USER@]HOST:DEST\n");
 662   rprintf(F,"  or   rsync [OPTION]... SRC [SRC]... [USER@]HOST::DEST\n");
 663   rprintf(F,"  or   rsync [OPTION]... SRC [SRC]... rsync://[USER@]HOST[:PORT]/DEST\n");
 664   rprintf(F,"  or   rsync [OPTION]... [USER@]HOST:SRC [DEST]\n");
 665   rprintf(F,"  or   rsync [OPTION]... [USER@]HOST::SRC [DEST]\n");
 666   rprintf(F,"  or   rsync [OPTION]... rsync://[USER@]HOST[:PORT]/SRC [DEST]\n");
 667   rprintf(F,"The ':' usages connect via remote shell, while '::' & 'rsync://' usages connect\n");
 668   rprintf(F,"to an rsync daemon, and require SRC or DEST to start with a module name.\n");
 669   rprintf(F,"\n");
 670   rprintf(F,"Options\n");
 671   rprintf(F," -v, --verbose               increase verbosity\n");
 672   rprintf(F,"     --info=FLAGS            fine-grained informational verbosity\n");
 673   rprintf(F,"     --debug=FLAGS           fine-grained debug verbosity\n");
 674   rprintf(F,"     --msgs2stderr           special output handling for debugging\n");
 675   rprintf(F," -q, --quiet                 suppress non-error messages\n");
 676   rprintf(F,"     --no-motd               suppress daemon-mode MOTD (see manpage caveat)\n");
 677   rprintf(F," -c, --checksum              skip based on checksum, not mod-time & size\n");
 678   rprintf(F," -a, --archive               archive mode; equals -rlptgoD (no -H,-A,-X)\n");
 679   rprintf(F,"     --no-OPTION             turn off an implied OPTION (e.g. --no-D)\n");
 680   rprintf(F," -r, --recursive             recurse into directories\n");
 681   rprintf(F," -R, --relative              use relative path names\n");
 682   rprintf(F,"     --no-implied-dirs       don't send implied dirs with --relative\n");
 683   rprintf(F," -b, --backup                make backups (see --suffix & --backup-dir)\n");
 684   rprintf(F,"     --backup-dir=DIR        make backups into hierarchy based in DIR\n");
 685   rprintf(F,"     --suffix=SUFFIX         set backup suffix (default %s w/o --backup-dir)\n",BACKUP_SUFFIX);
 686   rprintf(F," -u, --update                skip files that are newer on the receiver\n");
 687   rprintf(F,"     --inplace               update destination files in-place (SEE MAN PAGE)\n");
 688   rprintf(F,"     --append                append data onto shorter files\n");
 689   rprintf(F,"     --append-verify         like --append, but with old data in file checksum\n");
 690   rprintf(F," -d, --dirs                  transfer directories without recursing\n");
 691   rprintf(F," -l, --links                 copy symlinks as symlinks\n");
 692   rprintf(F," -L, --copy-links            transform symlink into referent file/dir\n");
 693   rprintf(F,"     --copy-unsafe-links     only \"unsafe\" symlinks are transformed\n");
 694   rprintf(F,"     --safe-links            ignore symlinks that point outside the source tree\n");
 695   rprintf(F,"     --munge-links           munge symlinks to make them safer (but unusable)\n");
 696   rprintf(F," -k, --copy-dirlinks         transform symlink to a dir into referent dir\n");
 697   rprintf(F," -K, --keep-dirlinks         treat symlinked dir on receiver as dir\n");
 698   rprintf(F," -H, --hard-links            preserve hard links\n");
 699   rprintf(F," -p, --perms                 preserve permissions\n");
 700   rprintf(F," -E, --executability         preserve the file's executability\n");
 701   rprintf(F,"     --chmod=CHMOD           affect file and/or directory permissions\n");
 702 #ifdef SUPPORT_ACLS
 703   rprintf(F," -A, --acls                  preserve ACLs (implies --perms)\n");
 704 #endif
 705 #ifdef SUPPORT_XATTRS
 706   rprintf(F," -X, --xattrs                preserve extended attributes\n");
 707 #endif
 708   rprintf(F," -o, --owner                 preserve owner (super-user only)\n");
 709   rprintf(F," -g, --group                 preserve group\n");
 710   rprintf(F,"     --devices               preserve device files (super-user only)\n");
 711   rprintf(F,"     --specials              preserve special files\n");
 712   rprintf(F," -D                          same as --devices --specials\n");
 713   rprintf(F," -t, --times                 preserve modification times\n");
 714   rprintf(F," -O, --omit-dir-times        omit directories from --times\n");
 715   rprintf(F," -J, --omit-link-times       omit symlinks from --times\n");
 716   rprintf(F,"     --super                 receiver attempts super-user activities\n");
 717 #ifdef SUPPORT_XATTRS
 718   rprintf(F,"     --fake-super            store/recover privileged attrs using xattrs\n");
 719 #endif
 720   rprintf(F," -S, --sparse                turn sequences of nulls into sparse blocks\n");
 721 #ifdef SUPPORT_PREALLOCATION
 722   rprintf(F,"     --preallocate           allocate dest files before writing them\n");
 723 #else
 724   rprintf(F,"     --preallocate           pre-allocate dest files on remote receiver\n");
 725 #endif
 726   rprintf(F,"     --write-devices         write to devices as files (implies --inplace)\n");
 727   rprintf(F," -n, --dry-run               perform a trial run with no changes made\n");
 728   rprintf(F," -W, --whole-file            copy files whole (without delta-xfer algorithm)\n");
 729   rprintf(F,"     --checksum-choice=STR   choose the checksum algorithms\n");
 730   rprintf(F," -x, --one-file-system       don't cross filesystem boundaries\n");
 731   rprintf(F," -B, --block-size=SIZE       force a fixed checksum block-size\n");
 732   rprintf(F," -e, --rsh=COMMAND           specify the remote shell to use\n");
 733   rprintf(F,"     --rsync-path=PROGRAM    specify the rsync to run on the remote machine\n");
 734   rprintf(F,"     --existing              skip creating new files on receiver\n");
 735   rprintf(F,"     --ignore-existing       skip updating files that already exist on receiver\n");
 736   rprintf(F,"     --remove-source-files   sender removes synchronized files (non-dirs)\n");
 737   rprintf(F,"     --del                   an alias for --delete-during\n");
 738   rprintf(F,"     --delete                delete extraneous files from destination dirs\n");
 739   rprintf(F,"     --delete-before         receiver deletes before transfer, not during\n");
 740   rprintf(F,"     --delete-during         receiver deletes during the transfer\n");
 741   rprintf(F,"     --delete-delay          find deletions during, delete after\n");
 742   rprintf(F,"     --delete-after          receiver deletes after transfer, not during\n");
 743   rprintf(F,"     --delete-excluded       also delete excluded files from destination dirs\n");
 744   rprintf(F,"     --ignore-missing-args   ignore missing source args without error\n");
 745   rprintf(F,"     --delete-missing-args   delete missing source args from destination\n");
 746   rprintf(F,"     --ignore-errors         delete even if there are I/O errors\n");
 747   rprintf(F,"     --force                 force deletion of directories even if not empty\n");
 748   rprintf(F,"     --max-delete=NUM        don't delete more than NUM files\n");
 749   rprintf(F,"     --max-size=SIZE         don't transfer any file larger than SIZE\n");
 750   rprintf(F,"     --min-size=SIZE         don't transfer any file smaller than SIZE\n");
 751   rprintf(F,"     --partial               keep partially transferred files\n");
 752   rprintf(F,"     --partial-dir=DIR       put a partially transferred file into DIR\n");
 753   rprintf(F,"     --delay-updates         put all updated files into place at transfer's end\n");
 754   rprintf(F," -m, --prune-empty-dirs      prune empty directory chains from the file-list\n");
 755   rprintf(F,"     --numeric-ids           don't map uid/gid values by user/group name\n");
 756   rprintf(F,"     --usermap=STRING        custom username mapping\n");
 757   rprintf(F,"     --groupmap=STRING       custom groupname mapping\n");
 758   rprintf(F,"     --chown=USER:GROUP      simple username/groupname mapping\n");
 759   rprintf(F,"     --timeout=SECONDS       set I/O timeout in seconds\n");
 760   rprintf(F,"     --contimeout=SECONDS    set daemon connection timeout in seconds\n");
 761   rprintf(F," -I, --ignore-times          don't skip files that match in size and mod-time\n");
 762   rprintf(F," -M, --remote-option=OPTION  send OPTION to the remote side only\n");
 763   rprintf(F,"     --size-only             skip files that match in size\n");
 764   rprintf(F," -@, --modify-window=NUM     set the accuracy for mod-time comparisons\n");
 765   rprintf(F," -T, --temp-dir=DIR          create temporary files in directory DIR\n");
 766   rprintf(F," -y, --fuzzy                 find similar file for basis if no dest file\n");
 767   rprintf(F,"     --compare-dest=DIR      also compare destination files relative to DIR\n");
 768   rprintf(F,"     --copy-dest=DIR         ... and include copies of unchanged files\n");
 769   rprintf(F,"     --link-dest=DIR         hardlink to files in DIR when unchanged\n");
 770   rprintf(F," -z, --compress              compress file data during the transfer\n");
 771   rprintf(F,"     --compress-level=NUM    explicitly set compression level\n");
 772   rprintf(F,"     --skip-compress=LIST    skip compressing files with a suffix in LIST\n");
 773   rprintf(F," -C, --cvs-exclude           auto-ignore files the same way CVS does\n");
 774   rprintf(F," -f, --filter=RULE           add a file-filtering RULE\n");
 775   rprintf(F," -F                          same as --filter='dir-merge /.rsync-filter'\n");
 776   rprintf(F,"                             repeated: --filter='- .rsync-filter'\n");
 777   rprintf(F,"     --exclude=PATTERN       exclude files matching PATTERN\n");
 778   rprintf(F,"     --exclude-from=FILE     read exclude patterns from FILE\n");
 779   rprintf(F,"     --include=PATTERN       don't exclude files matching PATTERN\n");
 780   rprintf(F,"     --include-from=FILE     read include patterns from FILE\n");
 781   rprintf(F,"     --files-from=FILE       read list of source-file names from FILE\n");
 782   rprintf(F," -0, --from0                 all *-from/filter files are delimited by 0s\n");
 783   rprintf(F," -s, --protect-args          no space-splitting; only wildcard special-chars\n");
 784   rprintf(F,"     --copy-as=USER[:GROUP]  specify user & optional group for the copy\n");
 785   rprintf(F,"     --address=ADDRESS       bind address for outgoing socket to daemon\n");
 786   rprintf(F,"     --port=PORT             specify double-colon alternate port number\n");
 787   rprintf(F,"     --sockopts=OPTIONS      specify custom TCP options\n");
 788   rprintf(F,"     --blocking-io           use blocking I/O for the remote shell\n");
 789   rprintf(F,"     --stats                 give some file-transfer stats\n");
 790   rprintf(F," -8, --8-bit-output          leave high-bit chars unescaped in output\n");
 791   rprintf(F," -h, --human-readable        output numbers in a human-readable format\n");
 792   rprintf(F,"     --progress              show progress during transfer\n");
 793   rprintf(F," -P                          same as --partial --progress\n");
 794   rprintf(F," -i, --itemize-changes       output a change-summary for all updates\n");
 795   rprintf(F,"     --out-format=FORMAT     output updates using the specified FORMAT\n");
 796   rprintf(F,"     --log-file=FILE         log what we're doing to the specified FILE\n");
 797   rprintf(F,"     --log-file-format=FMT   log updates using the specified FMT\n");
 798   rprintf(F,"     --password-file=FILE    read daemon-access password from FILE\n");
 799   rprintf(F,"     --list-only             list the files instead of copying them\n");
 800   rprintf(F,"     --bwlimit=RATE          limit socket I/O bandwidth\n");
 801 #ifdef HAVE_SETVBUF
 802   rprintf(F,"     --outbuf=N|L|B          set output buffering to None, Line, or Block\n");
 803 #endif
 804   rprintf(F,"     --write-batch=FILE      write a batched update to FILE\n");
 805   rprintf(F,"     --only-write-batch=FILE like --write-batch but w/o updating destination\n");
 806   rprintf(F,"     --read-batch=FILE       read a batched update from FILE\n");
 807   rprintf(F,"     --protocol=NUM          force an older protocol version to be used\n");
 808 #ifdef ICONV_OPTION
 809   rprintf(F,"     --iconv=CONVERT_SPEC    request charset conversion of filenames\n");
 810 #endif
 811   rprintf(F,"     --checksum-seed=NUM     set block/file checksum seed (advanced)\n");
 812   rprintf(F," -4, --ipv4                  prefer IPv4\n");
 813   rprintf(F," -6, --ipv6                  prefer IPv6\n");
 814   rprintf(F,"     --version               print version number\n");
 815   rprintf(F,"(-h) --help                  show this help (-h is --help only if used alone)\n");
 816
 817   rprintf(F,"\n");
 818   rprintf(F,"Use \"rsync --daemon --help\" to see the daemon-mode command-line options.\n");
 819   rprintf(F,"Please see the rsync(1) and rsyncd.conf(5) man pages for full documentation.\n");
 820   rprintf(F,"See http://rsync.samba.org/ for updates, bug reports, and answers\n");
 821 }
 822
 823 enum {OPT_VERSION = 1000, OPT_DAEMON, OPT_SENDER, OPT_EXCLUDE, OPT_EXCLUDE_FROM,
 824       OPT_FILTER, OPT_COMPARE_DEST, OPT_COPY_DEST, OPT_LINK_DEST, OPT_HELP,
 825       OPT_INCLUDE, OPT_INCLUDE_FROM, OPT_MODIFY_WINDOW, OPT_MIN_SIZE, OPT_CHMOD,
 826       OPT_READ_BATCH, OPT_WRITE_BATCH, OPT_ONLY_WRITE_BATCH, OPT_MAX_SIZE,
 827       OPT_NO_D, OPT_APPEND, OPT_NO_ICONV, OPT_INFO, OPT_DEBUG,
 828       OPT_USERMAP, OPT_GROUPMAP, OPT_CHOWN, OPT_BWLIMIT,
 829       OPT_SERVER, OPT_REFUSED_BASE = 9000};
 830
 831 static struct poptOption long_options[] = {
 832   /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
 833   {"help",             0,  POPT_ARG_NONE,   0, OPT_HELP, 0, 0 },
 834   {"version",          0,  POPT_ARG_NONE,   0, OPT_VERSION, 0, 0},
 835   {"verbose",         'v', POPT_ARG_NONE,   0, 'v', 0, 0 },
 836   {"no-verbose",       0,  POPT_ARG_VAL,    &verbose, 0, 0, 0 },
 837   {"no-v",             0,  POPT_ARG_VAL,    &verbose, 0, 0, 0 },
 838   {"info",             0,  POPT_ARG_STRING, 0, OPT_INFO, 0, 0 },
 839   {"debug",            0,  POPT_ARG_STRING, 0, OPT_DEBUG, 0, 0 },
 840   {"msgs2stderr",      0,  POPT_ARG_NONE,   &msgs2stderr, 0, 0, 0 },
 841   {"quiet",           'q', POPT_ARG_NONE,   0, 'q', 0, 0 },
 842   {"motd",             0,  POPT_ARG_VAL,    &output_motd, 1, 0, 0 },
 843   {"no-motd",          0,  POPT_ARG_VAL,    &output_motd, 0, 0, 0 },
 844   {"stats",            0,  POPT_ARG_NONE,   &do_stats, 0, 0, 0 },
 845   {"human-readable",  'h', POPT_ARG_NONE,   0, 'h', 0, 0},
 846   {"no-human-readable",0,  POPT_ARG_VAL,    &human_readable, 0, 0, 0},
 847   {"no-h",             0,  POPT_ARG_VAL,    &human_readable, 0, 0, 0},
 848   {"dry-run",         'n', POPT_ARG_NONE,   &dry_run, 0, 0, 0 },
 849   {"archive",         'a', POPT_ARG_NONE,   0, 'a', 0, 0 },
 850   {"recursive",       'r', POPT_ARG_VAL,    &recurse, 2, 0, 0 },
 851   {"no-recursive",     0,  POPT_ARG_VAL,    &recurse, 0, 0, 0 },
 852   {"no-r",             0,  POPT_ARG_VAL,    &recurse, 0, 0, 0 },
 853   {"inc-recursive",    0,  POPT_ARG_VAL,    &allow_inc_recurse, 1, 0, 0 },
 854   {"no-inc-recursive", 0,  POPT_ARG_VAL,    &allow_inc_recurse, 0, 0, 0 },
 855   {"i-r",              0,  POPT_ARG_VAL,    &allow_inc_recurse, 1, 0, 0 },
 856   {"no-i-r",           0,  POPT_ARG_VAL,    &allow_inc_recurse, 0, 0, 0 },
 857   {"dirs",            'd', POPT_ARG_VAL,    &xfer_dirs, 2, 0, 0 },
 858   {"no-dirs",          0,  POPT_ARG_VAL,    &xfer_dirs, 0, 0, 0 },
 859   {"no-d",             0,  POPT_ARG_VAL,    &xfer_dirs, 0, 0, 0 },
 860   {"old-dirs",         0,  POPT_ARG_VAL,    &xfer_dirs, 4, 0, 0 },
 861   {"old-d",            0,  POPT_ARG_VAL,    &xfer_dirs, 4, 0, 0 },
 862   {"perms",           'p', POPT_ARG_VAL,    &preserve_perms, 1, 0, 0 },
 863   {"no-perms",         0,  POPT_ARG_VAL,    &preserve_perms, 0, 0, 0 },
 864   {"no-p",             0,  POPT_ARG_VAL,    &preserve_perms, 0, 0, 0 },
 865   {"executability",   'E', POPT_ARG_NONE,   &preserve_executability, 0, 0, 0 },
 866   {"acls",            'A', POPT_ARG_NONE,   0, 'A', 0, 0 },
 867   {"no-acls",          0,  POPT_ARG_VAL,    &preserve_acls, 0, 0, 0 },
 868   {"no-A",             0,  POPT_ARG_VAL,    &preserve_acls, 0, 0, 0 },
 869   {"xattrs",          'X', POPT_ARG_NONE,   0, 'X', 0, 0 },
 870   {"no-xattrs",        0,  POPT_ARG_VAL,    &preserve_xattrs, 0, 0, 0 },
 871   {"no-X",             0,  POPT_ARG_VAL,    &preserve_xattrs, 0, 0, 0 },
 872   {"times",           't', POPT_ARG_VAL,    &preserve_times, 1, 0, 0 },
 873   {"no-times",         0,  POPT_ARG_VAL,    &preserve_times, 0, 0, 0 },
 874   {"no-t",             0,  POPT_ARG_VAL,    &preserve_times, 0, 0, 0 },
 875   {"omit-dir-times",  'O', POPT_ARG_VAL,    &omit_dir_times, 1, 0, 0 },
 876   {"no-omit-dir-times",0,  POPT_ARG_VAL,    &omit_dir_times, 0, 0, 0 },
 877   {"no-O",             0,  POPT_ARG_VAL,    &omit_dir_times, 0, 0, 0 },
 878   {"omit-link-times", 'J', POPT_ARG_VAL,    &omit_link_times, 1, 0, 0 },
 879   {"no-omit-link-times",0, POPT_ARG_VAL,    &omit_link_times, 0, 0, 0 },
 880   {"no-J",             0,  POPT_ARG_VAL,    &omit_link_times, 0, 0, 0 },
 881   {"modify-window",   '@', POPT_ARG_INT,    &modify_window, OPT_MODIFY_WINDOW, 0, 0 },
 882   {"super",            0,  POPT_ARG_VAL,    &am_root, 2, 0, 0 },
 883   {"no-super",         0,  POPT_ARG_VAL,    &am_root, 0, 0, 0 },
 884   {"fake-super",       0,  POPT_ARG_VAL,    &am_root, -1, 0, 0 },
 885   {"owner",           'o', POPT_ARG_VAL,    &preserve_uid, 1, 0, 0 },
 886   {"no-owner",         0,  POPT_ARG_VAL,    &preserve_uid, 0, 0, 0 },
 887   {"no-o",             0,  POPT_ARG_VAL,    &preserve_uid, 0, 0, 0 },
 888   {"group",           'g', POPT_ARG_VAL,    &preserve_gid, 1, 0, 0 },
 889   {"no-group",         0,  POPT_ARG_VAL,    &preserve_gid, 0, 0, 0 },
 890   {"no-g",             0,  POPT_ARG_VAL,    &preserve_gid, 0, 0, 0 },
 891   {0,                 'D', POPT_ARG_NONE,   0, 'D', 0, 0 },
 892   {"no-D",             0,  POPT_ARG_NONE,   0, OPT_NO_D, 0, 0 },
 893   {"devices",          0,  POPT_ARG_VAL,    &preserve_devices, 1, 0, 0 },
 894   {"no-devices",       0,  POPT_ARG_VAL,    &preserve_devices, 0, 0, 0 },
 895   {"write-devices",    0,  POPT_ARG_VAL,    &write_devices, 1, 0, 0 },
 896   {"no-write-devices", 0,  POPT_ARG_VAL,    &write_devices, 0, 0, 0 },
 897   {"specials",         0,  POPT_ARG_VAL,    &preserve_specials, 1, 0, 0 },
 898   {"no-specials",      0,  POPT_ARG_VAL,    &preserve_specials, 0, 0, 0 },
 899   {"links",           'l', POPT_ARG_VAL,    &preserve_links, 1, 0, 0 },
 900   {"no-links",         0,  POPT_ARG_VAL,    &preserve_links, 0, 0, 0 },
 901   {"no-l",             0,  POPT_ARG_VAL,    &preserve_links, 0, 0, 0 },
 902   {"copy-links",      'L', POPT_ARG_NONE,   &copy_links, 0, 0, 0 },
 903   {"copy-unsafe-links",0,  POPT_ARG_NONE,   &copy_unsafe_links, 0, 0, 0 },
 904   {"safe-links",       0,  POPT_ARG_NONE,   &safe_symlinks, 0, 0, 0 },
 905   {"munge-links",      0,  POPT_ARG_VAL,    &munge_symlinks, 1, 0, 0 },
 906   {"no-munge-links",   0,  POPT_ARG_VAL,    &munge_symlinks, 0, 0, 0 },
 907   {"copy-dirlinks",   'k', POPT_ARG_NONE,   &copy_dirlinks, 0, 0, 0 },
 908   {"keep-dirlinks",   'K', POPT_ARG_NONE,   &keep_dirlinks, 0, 0, 0 },
 909   {"hard-links",      'H', POPT_ARG_NONE,   0, 'H', 0, 0 },
 910   {"no-hard-links",    0,  POPT_ARG_VAL,    &preserve_hard_links, 0, 0, 0 },
 911   {"no-H",             0,  POPT_ARG_VAL,    &preserve_hard_links, 0, 0, 0 },
 912   {"relative",        'R', POPT_ARG_VAL,    &relative_paths, 1, 0, 0 },
 913   {"no-relative",      0,  POPT_ARG_VAL,    &relative_paths, 0, 0, 0 },
 914   {"no-R",             0,  POPT_ARG_VAL,    &relative_paths, 0, 0, 0 },
 915   {"implied-dirs",     0,  POPT_ARG_VAL,    &implied_dirs, 1, 0, 0 },
 916   {"no-implied-dirs",  0,  POPT_ARG_VAL,    &implied_dirs, 0, 0, 0 },
 917   {"i-d",              0,  POPT_ARG_VAL,    &implied_dirs, 1, 0, 0 },
 918   {"no-i-d",           0,  POPT_ARG_VAL,    &implied_dirs, 0, 0, 0 },
 919   {"chmod",            0,  POPT_ARG_STRING, 0, OPT_CHMOD, 0, 0 },
 920   {"ignore-times",    'I', POPT_ARG_NONE,   &ignore_times, 0, 0, 0 },
 921   {"size-only",        0,  POPT_ARG_NONE,   &size_only, 0, 0, 0 },
 922   {"one-file-system", 'x', POPT_ARG_NONE,   0, 'x', 0, 0 },
 923   {"no-one-file-system",0, POPT_ARG_VAL,    &one_file_system, 0, 0, 0 },
 924   {"no-x",             0,  POPT_ARG_VAL,    &one_file_system, 0, 0, 0 },
 925   {"update",          'u', POPT_ARG_NONE,   &update_only, 0, 0, 0 },
 926   {"existing",         0,  POPT_ARG_NONE,   &ignore_non_existing, 0, 0, 0 },
 927   {"ignore-non-existing",0,POPT_ARG_NONE,   &ignore_non_existing, 0, 0, 0 },
 928   {"ignore-existing",  0,  POPT_ARG_NONE,   &ignore_existing, 0, 0, 0 },
 929   {"max-size",         0,  POPT_ARG_STRING, &max_size_arg, OPT_MAX_SIZE, 0, 0 },
 930   {"min-size",         0,  POPT_ARG_STRING, &min_size_arg, OPT_MIN_SIZE, 0, 0 },
 931   {"sparse",          'S', POPT_ARG_VAL,    &sparse_files, 1, 0, 0 },
 932   {"no-sparse",        0,  POPT_ARG_VAL,    &sparse_files, 0, 0, 0 },
 933   {"no-S",             0,  POPT_ARG_VAL,    &sparse_files, 0, 0, 0 },
 934   {"preallocate",      0,  POPT_ARG_NONE,   &preallocate_files, 0, 0, 0},
 935   {"inplace",          0,  POPT_ARG_VAL,    &inplace, 1, 0, 0 },
 936   {"no-inplace",       0,  POPT_ARG_VAL,    &inplace, 0, 0, 0 },
 937   {"append",           0,  POPT_ARG_NONE,   0, OPT_APPEND, 0, 0 },
 938   {"append-verify",    0,  POPT_ARG_VAL,    &append_mode, 2, 0, 0 },
 939   {"no-append",        0,  POPT_ARG_VAL,    &append_mode, 0, 0, 0 },
 940   {"del",              0,  POPT_ARG_NONE,   &delete_during, 0, 0, 0 },
 941   {"delete",           0,  POPT_ARG_NONE,   &delete_mode, 0, 0, 0 },
 942   {"delete-before",    0,  POPT_ARG_NONE,   &delete_before, 0, 0, 0 },
 943   {"delete-during",    0,  POPT_ARG_VAL,    &delete_during, 1, 0, 0 },
 944   {"delete-delay",     0,  POPT_ARG_VAL,    &delete_during, 2, 0, 0 },
 945   {"delete-after",     0,  POPT_ARG_NONE,   &delete_after, 0, 0, 0 },
 946   {"delete-excluded",  0,  POPT_ARG_NONE,   &delete_excluded, 0, 0, 0 },
 947   {"delete-missing-args",0,POPT_BIT_SET,    &missing_args, 2, 0, 0 },
 948   {"ignore-missing-args",0,POPT_BIT_SET,    &missing_args, 1, 0, 0 },
 949   {"remove-sent-files",0,  POPT_ARG_VAL,    &remove_source_files, 2, 0, 0 }, /* deprecated */
 950   {"remove-source-files",0,POPT_ARG_VAL,    &remove_source_files, 1, 0, 0 },
 951   {"force",            0,  POPT_ARG_VAL,    &force_delete, 1, 0, 0 },
 952   {"no-force",         0,  POPT_ARG_VAL,    &force_delete, 0, 0, 0 },
 953   {"ignore-errors",    0,  POPT_ARG_VAL,    &ignore_errors, 1, 0, 0 },
 954   {"no-ignore-errors", 0,  POPT_ARG_VAL,    &ignore_errors, 0, 0, 0 },
 955   {"max-delete",       0,  POPT_ARG_INT,    &max_delete, 0, 0, 0 },
 956   {0,                 'F', POPT_ARG_NONE,   0, 'F', 0, 0 },
 957   {"filter",          'f', POPT_ARG_STRING, 0, OPT_FILTER, 0, 0 },
 958   {"exclude",          0,  POPT_ARG_STRING, 0, OPT_EXCLUDE, 0, 0 },
 959   {"include",          0,  POPT_ARG_STRING, 0, OPT_INCLUDE, 0, 0 },
 960   {"exclude-from",     0,  POPT_ARG_STRING, 0, OPT_EXCLUDE_FROM, 0, 0 },
 961   {"include-from",     0,  POPT_ARG_STRING, 0, OPT_INCLUDE_FROM, 0, 0 },
 962   {"cvs-exclude",     'C', POPT_ARG_NONE,   &cvs_exclude, 0, 0, 0 },
 963   {"whole-file",      'W', POPT_ARG_VAL,    &whole_file, 1, 0, 0 },
 964   {"no-whole-file",    0,  POPT_ARG_VAL,    &whole_file, 0, 0, 0 },
 965   {"checksum-choice",  0,  POPT_ARG_STRING, &checksum_choice, 0, 0, 0 },
 966   {"no-W",             0,  POPT_ARG_VAL,    &whole_file, 0, 0, 0 },
 967   {"checksum",        'c', POPT_ARG_VAL,    &always_checksum, 1, 0, 0 },
 968   {"no-checksum",      0,  POPT_ARG_VAL,    &always_checksum, 0, 0, 0 },
 969   {"no-c",             0,  POPT_ARG_VAL,    &always_checksum, 0, 0, 0 },
 970   {"block-size",      'B', POPT_ARG_LONG,   &block_size, 0, 0, 0 },
 971   {"compare-dest",     0,  POPT_ARG_STRING, 0, OPT_COMPARE_DEST, 0, 0 },
 972   {"copy-dest",        0,  POPT_ARG_STRING, 0, OPT_COPY_DEST, 0, 0 },
 973   {"link-dest",        0,  POPT_ARG_STRING, 0, OPT_LINK_DEST, 0, 0 },
 974   {"fuzzy",           'y', POPT_ARG_NONE,   0, 'y', 0, 0 },
 975   {"no-fuzzy",         0,  POPT_ARG_VAL,    &fuzzy_basis, 0, 0, 0 },
 976   {"no-y",             0,  POPT_ARG_VAL,    &fuzzy_basis, 0, 0, 0 },
 977   {"compress",        'z', POPT_ARG_NONE,   0, 'z', 0, 0 },
 978   {"old-compress",     0,  POPT_ARG_VAL,    &do_compression, 1, 0, 0 },
 979   {"new-compress",     0,  POPT_ARG_VAL,    &do_compression, 2, 0, 0 },
 980   {"no-compress",      0,  POPT_ARG_VAL,    &do_compression, 0, 0, 0 },
 981   {"no-z",             0,  POPT_ARG_VAL,    &do_compression, 0, 0, 0 },
 982   {"skip-compress",    0,  POPT_ARG_STRING, &skip_compress, 0, 0, 0 },
 983   {"compress-level",   0,  POPT_ARG_INT,    &def_compress_level, 0, 0, 0 },
 984   {0,                 'P', POPT_ARG_NONE,   0, 'P', 0, 0 },
 985   {"progress",         0,  POPT_ARG_VAL,    &do_progress, 1, 0, 0 },
 986   {"no-progress",      0,  POPT_ARG_VAL,    &do_progress, 0, 0, 0 },
 987   {"partial",          0,  POPT_ARG_VAL,    &keep_partial, 1, 0, 0 },
 988   {"no-partial",       0,  POPT_ARG_VAL,    &keep_partial, 0, 0, 0 },
 989   {"partial-dir",      0,  POPT_ARG_STRING, &partial_dir, 0, 0, 0 },
 990   {"delay-updates",    0,  POPT_ARG_VAL,    &delay_updates, 1, 0, 0 },
 991   {"no-delay-updates", 0,  POPT_ARG_VAL,    &delay_updates, 0, 0, 0 },
 992   {"prune-empty-dirs",'m', POPT_ARG_VAL,    &prune_empty_dirs, 1, 0, 0 },
 993   {"no-prune-empty-dirs",0,POPT_ARG_VAL,    &prune_empty_dirs, 0, 0, 0 },
 994   {"no-m",             0,  POPT_ARG_VAL,    &prune_empty_dirs, 0, 0, 0 },
 995   {"log-file",         0,  POPT_ARG_STRING, &logfile_name, 0, 0, 0 },
 996   {"log-file-format",  0,  POPT_ARG_STRING, &logfile_format, 0, 0, 0 },
 997   {"out-format",       0,  POPT_ARG_STRING, &stdout_format, 0, 0, 0 },
 998   {"log-format",       0,  POPT_ARG_STRING, &stdout_format, 0, 0, 0 }, /* DEPRECATED */
 999   {"itemize-changes", 'i', POPT_ARG_NONE,   0, 'i', 0, 0 },
1000   {"no-itemize-changes",0, POPT_ARG_VAL,    &itemize_changes, 0, 0, 0 },
1001   {"no-i",             0,  POPT_ARG_VAL,    &itemize_changes, 0, 0, 0 },
1002   {"bwlimit",          0,  POPT_ARG_STRING, &bwlimit_arg, OPT_BWLIMIT, 0, 0 },
1003   {"no-bwlimit",       0,  POPT_ARG_VAL,    &bwlimit, 0, 0, 0 },
1004   {"backup",          'b', POPT_ARG_VAL,    &make_backups, 1, 0, 0 },
1005   {"no-backup",        0,  POPT_ARG_VAL,    &make_backups, 0, 0, 0 },
1006   {"backup-dir",       0,  POPT_ARG_STRING, &backup_dir, 0, 0, 0 },
1007   {"suffix",           0,  POPT_ARG_STRING, &backup_suffix, 0, 0, 0 },
1008   {"list-only",        0,  POPT_ARG_VAL,    &list_only, 2, 0, 0 },
1009   {"read-batch",       0,  POPT_ARG_STRING, &batch_name, OPT_READ_BATCH, 0, 0 },
1010   {"write-batch",      0,  POPT_ARG_STRING, &batch_name, OPT_WRITE_BATCH, 0, 0 },
1011   {"only-write-batch", 0,  POPT_ARG_STRING, &batch_name, OPT_ONLY_WRITE_BATCH, 0, 0 },
1012   {"files-from",       0,  POPT_ARG_STRING, &files_from, 0, 0, 0 },
1013   {"from0",           '0', POPT_ARG_VAL,    &eol_nulls, 1, 0, 0},
1014   {"no-from0",         0,  POPT_ARG_VAL,    &eol_nulls, 0, 0, 0},
1015   {"protect-args",    's', POPT_ARG_VAL,    &protect_args, 1, 0, 0},
1016   {"no-protect-args",  0,  POPT_ARG_VAL,    &protect_args, 0, 0, 0},
1017   {"no-s",             0,  POPT_ARG_VAL,    &protect_args, 0, 0, 0},
1018   {"numeric-ids",      0,  POPT_ARG_VAL,    &numeric_ids, 1, 0, 0 },
1019   {"no-numeric-ids",   0,  POPT_ARG_VAL,    &numeric_ids, 0, 0, 0 },
1020   {"usermap",          0,  POPT_ARG_STRING, 0, OPT_USERMAP, 0, 0 },
1021   {"groupmap",         0,  POPT_ARG_STRING, 0, OPT_GROUPMAP, 0, 0 },
1022   {"chown",            0,  POPT_ARG_STRING, 0, OPT_CHOWN, 0, 0 },
1023   {"timeout",          0,  POPT_ARG_INT,    &io_timeout, 0, 0, 0 },
1024   {"no-timeout",       0,  POPT_ARG_VAL,    &io_timeout, 0, 0, 0 },
1025   {"contimeout",       0,  POPT_ARG_INT,    &connect_timeout, 0, 0, 0 },
1026   {"no-contimeout",    0,  POPT_ARG_VAL,    &connect_timeout, 0, 0, 0 },
1027   {"rsh",             'e', POPT_ARG_STRING, &shell_cmd, 0, 0, 0 },
1028   {"rsync-path",       0,  POPT_ARG_STRING, &rsync_path, 0, 0, 0 },
1029   {"temp-dir",        'T', POPT_ARG_STRING, &tmpdir, 0, 0, 0 },
1030 #ifdef ICONV_OPTION
1031   {"iconv",            0,  POPT_ARG_STRING, &iconv_opt, 0, 0, 0 },
1032   {"no-iconv",         0,  POPT_ARG_NONE,   0, OPT_NO_ICONV, 0, 0 },
1033 #endif
1034   {"ipv4",            '4', POPT_ARG_VAL,    &default_af_hint, AF_INET, 0, 0 },
1035   {"ipv6",            '6', POPT_ARG_VAL,    &default_af_hint, AF_INET6, 0, 0 },
1036   {"8-bit-output",    '8', POPT_ARG_VAL,    &allow_8bit_chars, 1, 0, 0 },
1037   {"no-8-bit-output",  0,  POPT_ARG_VAL,    &allow_8bit_chars, 0, 0, 0 },
1038   {"no-8",             0,  POPT_ARG_VAL,    &allow_8bit_chars, 0, 0, 0 },
1039   {"qsort",            0,  POPT_ARG_NONE,   &use_qsort, 0, 0, 0 },
1040   {"copy-as",          0,  POPT_ARG_STRING, &copy_as, 0, 0, 0 },
1041   {"address",          0,  POPT_ARG_STRING, &bind_address, 0, 0, 0 },
1042   {"port",             0,  POPT_ARG_INT,    &rsync_port, 0, 0, 0 },
1043   {"sockopts",         0,  POPT_ARG_STRING, &sockopts, 0, 0, 0 },
1044   {"password-file",    0,  POPT_ARG_STRING, &password_file, 0, 0, 0 },
1045   {"blocking-io",      0,  POPT_ARG_VAL,    &blocking_io, 1, 0, 0 },
1046   {"no-blocking-io",   0,  POPT_ARG_VAL,    &blocking_io, 0, 0, 0 },
1047 #ifdef HAVE_SETVBUF
1048   {"outbuf",           0,  POPT_ARG_STRING, &outbuf_mode, 0, 0, 0 },
1049 #endif
1050   {"remote-option",   'M', POPT_ARG_STRING, 0, 'M', 0, 0 },
1051   {"protocol",         0,  POPT_ARG_INT,    &protocol_version, 0, 0, 0 },
1052   {"checksum-seed",    0,  POPT_ARG_INT,    &checksum_seed, 0, 0, 0 },
1053   {"server",           0,  POPT_ARG_NONE,   0, OPT_SERVER, 0, 0 },
1054   {"sender",           0,  POPT_ARG_NONE,   0, OPT_SENDER, 0, 0 },
1055   /* All the following options switch us into daemon-mode option-parsing. */
1056   {"config",           0,  POPT_ARG_STRING, 0, OPT_DAEMON, 0, 0 },
1057   {"daemon",           0,  POPT_ARG_NONE,   0, OPT_DAEMON, 0, 0 },
1058   {"dparam",           0,  POPT_ARG_STRING, 0, OPT_DAEMON, 0, 0 },
1059   {"detach",           0,  POPT_ARG_NONE,   0, OPT_DAEMON, 0, 0 },
1060   {"no-detach",        0,  POPT_ARG_NONE,   0, OPT_DAEMON, 0, 0 },
1061   {0,0,0,0, 0, 0, 0}
1062 };
1063
1064 static void daemon_usage(enum logcode F)
1065 {
1066   print_rsync_version(F);
1067
1068   rprintf(F,"\n");
1069   rprintf(F,"Usage: rsync --daemon [OPTION]...\n");
1070   rprintf(F,"     --address=ADDRESS       bind to the specified address\n");
1071   rprintf(F,"     --bwlimit=RATE          limit socket I/O bandwidth\n");
1072   rprintf(F,"     --config=FILE           specify alternate rsyncd.conf file\n");
1073   rprintf(F," -M, --dparam=OVERRIDE       override global daemon config parameter\n");
1074   rprintf(F,"     --no-detach             do not detach from the parent\n");
1075   rprintf(F,"     --port=PORT             listen on alternate port number\n");
1076   rprintf(F,"     --log-file=FILE         override the \"log file\" setting\n");
1077   rprintf(F,"     --log-file-format=FMT   override the \"log format\" setting\n");
1078   rprintf(F,"     --sockopts=OPTIONS      specify custom TCP options\n");
1079   rprintf(F," -v, --verbose               increase verbosity\n");
1080   rprintf(F," -4, --ipv4                  prefer IPv4\n");
1081   rprintf(F," -6, --ipv6                  prefer IPv6\n");
1082   rprintf(F,"     --help                  show this help screen\n");
1083
1084   rprintf(F,"\n");
1085   rprintf(F,"If you were not trying to invoke rsync as a daemon, avoid using any of the\n");
1086   rprintf(F,"daemon-specific rsync options.  See also the rsyncd.conf(5) man page.\n");
1087 }
1088
1089 static struct poptOption long_daemon_options[] = {
1090   /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
1091   {"address",          0,  POPT_ARG_STRING, &bind_address, 0, 0, 0 },
1092   {"bwlimit",          0,  POPT_ARG_INT,    &daemon_bwlimit, 0, 0, 0 },
1093   {"config",           0,  POPT_ARG_STRING, &config_file, 0, 0, 0 },
1094   {"daemon",           0,  POPT_ARG_NONE,   &daemon_opt, 0, 0, 0 },
1095   {"dparam",          'M', POPT_ARG_STRING, 0, 'M', 0, 0 },
1096   {"ipv4",            '4', POPT_ARG_VAL,    &default_af_hint, AF_INET, 0, 0 },
1097   {"ipv6",            '6', POPT_ARG_VAL,    &default_af_hint, AF_INET6, 0, 0 },
1098   {"detach",           0,  POPT_ARG_VAL,    &no_detach, 0, 0, 0 },
1099   {"no-detach",        0,  POPT_ARG_VAL,    &no_detach, 1, 0, 0 },
1100   {"log-file",         0,  POPT_ARG_STRING, &logfile_name, 0, 0, 0 },
1101   {"log-file-format",  0,  POPT_ARG_STRING, &logfile_format, 0, 0, 0 },
1102   {"port",             0,  POPT_ARG_INT,    &rsync_port, 0, 0, 0 },
1103   {"sockopts",         0,  POPT_ARG_STRING, &sockopts, 0, 0, 0 },
1104   {"protocol",         0,  POPT_ARG_INT,    &protocol_version, 0, 0, 0 },
1105   {"server",           0,  POPT_ARG_NONE,   &am_server, 0, 0, 0 },
1106   {"temp-dir",        'T', POPT_ARG_STRING, &tmpdir, 0, 0, 0 },
1107   {"verbose",         'v', POPT_ARG_NONE,   0, 'v', 0, 0 },
1108   {"no-verbose",       0,  POPT_ARG_VAL,    &verbose, 0, 0, 0 },
1109   {"no-v",             0,  POPT_ARG_VAL,    &verbose, 0, 0, 0 },
1110   {"help",            'h', POPT_ARG_NONE,   0, 'h', 0, 0 },
1111   {0,0,0,0, 0, 0, 0}
1112 };
1113
1114
1115 static char err_buf[200];
1116
1117
1118 /**
1119  * Store the option error message, if any, so that we can log the
1120  * connection attempt (which requires parsing the options), and then
1121  * show the error later on.
1122  **/
1123 void option_error(void)
1124 {
1125         if (!err_buf[0]) {
1126                 strlcpy(err_buf, "Error parsing options: option may "
1127                         "be supported on client but not on server?\n",
1128                         sizeof err_buf);
1129         }
1130
1131         rprintf(FERROR, RSYNC_NAME ": %s", err_buf);
1132         msleep(20);
1133 }
1134
1135
1136 /**
1137  * Tweak the option table to disable all options that the rsyncd.conf
1138  * file has told us to refuse.
1139  **/
1140 static void set_refuse_options(char *bp)
1141 {
1142         struct poptOption *op;
1143         char *cp, shortname[2];
1144         int is_wild, found_match;
1145
1146         shortname[1] = '\0';
1147
1148         while (1) {
1149                 while (*bp == ' ') bp++;
1150                 if (!*bp)
1151                         break;
1152                 if ((cp = strchr(bp, ' ')) != NULL)
1153                         *cp= '\0';
1154                 is_wild = strpbrk(bp, "*?[") != NULL;
1155                 found_match = 0;
1156                 for (op = long_options; ; op++) {
1157                         *shortname = op->shortName;
1158                         if (!op->longName && !*shortname)
1159                                 break;
1160                         if ((op->longName && wildmatch(bp, op->longName))
1161                             || (*shortname && wildmatch(bp, shortname))) {
1162                                 if (op->argInfo == POPT_ARG_VAL)
1163                                         op->argInfo = POPT_ARG_NONE;
1164                                 op->val = (op - long_options) + OPT_REFUSED_BASE;
1165                                 found_match = 1;
1166                                 /* These flags are set to let us easily check
1167                                  * an implied option later in the code. */
1168                                 switch (*shortname) {
1169                                 case 'r': case 'd': case 'l': case 'p':
1170                                 case 't': case 'g': case 'o': case 'D':
1171                                         refused_archive_part = op->val;
1172                                         break;
1173                                 case 'z':
1174                                         refused_compress = op->val;
1175                                         break;
1176                                 case '\0':
1177                                         if (wildmatch("delete", op->longName))
1178                                                 refused_delete = op->val;
1179                                         else if (wildmatch("delete-before", op->longName))
1180                                                 refused_delete_before = op->val;
1181                                         else if (wildmatch("delete-during", op->longName))
1182                                                 refused_delete_during = op->val;
1183                                         else if (wildmatch("partial", op->longName))
1184                                                 refused_partial = op->val;
1185                                         else if (wildmatch("progress", op->longName))
1186                                                 refused_progress = op->val;
1187                                         else if (wildmatch("inplace", op->longName))
1188                                                 refused_inplace = op->val;
1189                                         else if (wildmatch("no-iconv", op->longName))
1190                                                 refused_no_iconv = op->val;
1191                                         break;
1192                                 }
1193                                 if (!is_wild)
1194                                         break;
1195                         }
1196                 }
1197                 if (!found_match) {
1198                         rprintf(FLOG, "No match for refuse-options string \"%s\"\n",
1199                                 bp);
1200                 }
1201                 if (!cp)
1202                         break;
1203                 *cp = ' ';
1204                 bp = cp + 1;
1205         }
1206 }
1207
1208
1209 static int count_args(const char **argv)
1210 {
1211         int i = 0;
1212
1213         if (argv) {
1214                 while (argv[i] != NULL)
1215                         i++;
1216         }
1217
1218         return i;
1219 }
1220
1221
1222 static OFF_T parse_size_arg(char **size_arg, char def_suf)
1223 {
1224         int reps, mult, make_compatible = 0;
1225         const char *arg;
1226         OFF_T size = 1;
1227
1228         for (arg = *size_arg; isDigit(arg); arg++) {}
1229         if (*arg == '.')
1230                 for (arg++; isDigit(arg); arg++) {}
1231         switch (*arg && *arg != '+' && *arg != '-' ? *arg++ : def_suf) {
1232         case 'b': case 'B':
1233                 reps = 0;
1234                 break;
1235         case 'k': case 'K':
1236                 reps = 1;
1237                 break;
1238         case 'm': case 'M':
1239                 reps = 2;
1240                 break;
1241         case 'g': case 'G':
1242                 reps = 3;
1243                 break;
1244         default:
1245                 return -1;
1246         }
1247         if (*arg == 'b' || *arg == 'B')
1248                 mult = 1000, make_compatible = 1, arg++;
1249         else if (!*arg || *arg == '+' || *arg == '-')
1250                 mult = 1024;
1251         else if (strncasecmp(arg, "ib", 2) == 0)
1252                 mult = 1024, arg += 2;
1253         else
1254                 return -1;
1255         while (reps--)
1256                 size *= mult;
1257         size *= atof(*size_arg);
1258         if ((*arg == '+' || *arg == '-') && arg[1] == '1')
1259                 size += atoi(arg), make_compatible = 1, arg += 2;
1260         if (*arg)
1261                 return -1;
1262         if (size > 0 && make_compatible && def_suf == 'b') {
1263                 /* We convert this manually because we may need %lld precision,
1264                  * and that's not a portable sprintf() escape. */
1265                 char buf[128], *s = buf + sizeof buf - 1;
1266                 OFF_T num = size;
1267                 *s = '\0';
1268                 while (num) {
1269                         *--s = (char)(num % 10) + '0';
1270                         num /= 10;
1271                 }
1272                 if (!(*size_arg = strdup(s)))
1273                         out_of_memory("parse_size_arg");
1274         }
1275         return size;
1276 }
1277
1278
1279 static void create_refuse_error(int which)
1280 {
1281         /* The "which" value is the index + OPT_REFUSED_BASE. */
1282         struct poptOption *op = &long_options[which - OPT_REFUSED_BASE];
1283         int n = snprintf(err_buf, sizeof err_buf,
1284                          "The server is configured to refuse --%s\n",
1285                          op->longName) - 1;
1286         if (op->shortName) {
1287                 snprintf(err_buf + n, sizeof err_buf - n,
1288                          " (-%c)\n", op->shortName);
1289         }
1290 }
1291
1292 /* This is used to make sure that --daemon & --server cannot be aliased to
1293  * something else. These options have always disabled popt aliases for the
1294  * parsing of a daemon or server command-line, but we have to make sure that
1295  * these options cannot vanish so that the alias disabling can take effect. */
1296 static void popt_unalias(poptContext con, const char *opt)
1297 {
1298         struct poptAlias unalias;
1299
1300         unalias.longName = opt + 2; /* point past the leading "--" */
1301         unalias.shortName = '\0';
1302         unalias.argc = 1;
1303         unalias.argv = new_array(const char*, 1);
1304         unalias.argv[0] = strdup(opt);
1305
1306         poptAddAlias(con, unalias, 0);
1307 }
1308
1309 /**
1310  * Process command line arguments.  Called on both local and remote.
1311  *
1312  * @retval 1 if all options are OK; with globals set to appropriate
1313  * values
1314  *
1315  * @retval 0 on error, with err_buf containing an explanation
1316  **/
1317 int parse_arguments(int *argc_p, const char ***argv_p)
1318 {
1319         static poptContext pc;
1320         char *ref = lp_refuse_options(module_id);
1321         const char *arg, **argv = *argv_p;
1322         int argc = *argc_p;
1323         int opt;
1324         int orig_protect_args = protect_args;
1325
1326         if (argc == 0) {
1327                 strlcpy(err_buf, "argc is zero!\n", sizeof err_buf);
1328                 return 0;
1329         }
1330         if (ref && *ref)
1331                 set_refuse_options(ref);
1332         if (am_daemon) {
1333                 set_refuse_options("log-file*");
1334 #ifdef ICONV_OPTION
1335                 if (!*lp_charset(module_id))
1336                         set_refuse_options("iconv");
1337 #endif
1338                 set_refuse_options("write-devices");
1339         }
1340
1341 #ifdef ICONV_OPTION
1342         if (!am_daemon && protect_args <= 0 && (arg = getenv("RSYNC_ICONV")) != NULL && *arg)
1343                 iconv_opt = strdup(arg);
1344 #endif
1345
1346         /* TODO: Call poptReadDefaultConfig; handle errors. */
1347
1348         /* The context leaks in case of an error, but if there's a
1349          * problem we always exit anyhow. */
1350         if (pc)
1351                 poptFreeContext(pc);
1352         pc = poptGetContext(RSYNC_NAME, argc, argv, long_options, 0);
1353         if (!am_server) {
1354                 poptReadDefaultConfig(pc, 0);
1355                 popt_unalias(pc, "--daemon");
1356                 popt_unalias(pc, "--server");
1357         }
1358
1359         while ((opt = poptGetNextOpt(pc)) != -1) {
1360                 /* most options are handled automatically by popt;
1361                  * only special cases are returned and listed here. */
1362
1363                 switch (opt) {
1364                 case OPT_VERSION:
1365                         print_rsync_version(FINFO);
1366                         exit_cleanup(0);
1367
1368                 case OPT_SERVER:
1369                         if (!am_server) {
1370                                 /* Disable popt aliases on the server side and
1371                                  * then start parsing the options again. */
1372                                 poptFreeContext(pc);
1373                                 pc = poptGetContext(RSYNC_NAME, argc, argv,
1374                                                     long_options, 0);
1375                                 am_server = 1;
1376                         }
1377 #ifdef ICONV_OPTION
1378                         iconv_opt = NULL;
1379 #endif
1380                         break;
1381
1382                 case OPT_SENDER:
1383                         if (!am_server) {
1384                                 usage(FERROR);
1385                                 exit_cleanup(RERR_SYNTAX);
1386                         }
1387                         am_sender = 1;
1388                         break;
1389
1390                 case OPT_DAEMON:
1391                         if (am_daemon) {
1392                                 strlcpy(err_buf,
1393                                         "Attempt to hack rsync thwarted!\n",
1394                                         sizeof err_buf);
1395                                 return 0;
1396                         }
1397 #ifdef ICONV_OPTION
1398                         iconv_opt = NULL;
1399 #endif
1400                         protect_args = 0;
1401                         poptFreeContext(pc);
1402                         pc = poptGetContext(RSYNC_NAME, argc, argv,
1403                                             long_daemon_options, 0);
1404                         while ((opt = poptGetNextOpt(pc)) != -1) {
1405                                 char **cpp;
1406                                 switch (opt) {
1407                                 case 'h':
1408                                         daemon_usage(FINFO);
1409                                         exit_cleanup(0);
1410
1411                                 case 'M':
1412                                         arg = poptGetOptArg(pc);
1413                                         if (!strchr(arg, '=')) {
1414                                                 rprintf(FERROR,
1415                                                     "--dparam value is missing an '=': %s\n",
1416                                                     arg);
1417                                                 goto daemon_error;
1418                                         }
1419                                         cpp = EXPAND_ITEM_LIST(&dparam_list, char *, 4);
1420                                         *cpp = strdup(arg);
1421                                         break;
1422
1423                                 case 'v':
1424                                         verbose++;
1425                                         break;
1426
1427                                 default:
1428                                         rprintf(FERROR,
1429                                             "rsync: %s: %s (in daemon mode)\n",
1430                                             poptBadOption(pc, POPT_BADOPTION_NOALIAS),
1431                                             poptStrerror(opt));
1432                                         goto daemon_error;
1433                                 }
1434                         }
1435
1436                         if (dparam_list.count && !set_dparams(1))
1437                                 exit_cleanup(RERR_SYNTAX);
1438
1439                         if (tmpdir && strlen(tmpdir) >= MAXPATHLEN - 10) {
1440                                 snprintf(err_buf, sizeof err_buf,
1441                                          "the --temp-dir path is WAY too long.\n");
1442                                 return 0;
1443                         }
1444
1445                         if (!daemon_opt) {
1446                                 rprintf(FERROR, "Daemon option(s) used without --daemon.\n");
1447                             daemon_error:
1448                                 rprintf(FERROR,
1449                                     "(Type \"rsync --daemon --help\" for assistance with daemon mode.)\n");
1450                                 exit_cleanup(RERR_SYNTAX);
1451                         }
1452
1453                         *argv_p = argv = poptGetArgs(pc);
1454                         *argc_p = argc = count_args(argv);
1455                         am_starting_up = 0;
1456                         daemon_opt = 0;
1457                         am_daemon = 1;
1458                         return 1;
1459
1460                 case OPT_MODIFY_WINDOW:
1461                         /* The value has already been set by popt, but
1462                          * we need to remember that we're using a
1463                          * non-default setting. */
1464                         modify_window_set = 1;
1465                         break;
1466
1467                 case OPT_FILTER:
1468                         parse_filter_str(&filter_list, poptGetOptArg(pc),
1469                                         rule_template(0), 0);
1470                         break;
1471
1472                 case OPT_EXCLUDE:
1473                         parse_filter_str(&filter_list, poptGetOptArg(pc),
1474                                         rule_template(0), XFLG_OLD_PREFIXES);
1475                         break;
1476
1477                 case OPT_INCLUDE:
1478                         parse_filter_str(&filter_list, poptGetOptArg(pc),
1479                                         rule_template(FILTRULE_INCLUDE), XFLG_OLD_PREFIXES);
1480                         break;
1481
1482                 case OPT_EXCLUDE_FROM:
1483                 case OPT_INCLUDE_FROM:
1484                         arg = poptGetOptArg(pc);
1485                         if (sanitize_paths)
1486                                 arg = sanitize_path(NULL, arg, NULL, 0, SP_DEFAULT);
1487                         if (daemon_filter_list.head) {
1488                                 int rej;
1489                                 char *cp = strdup(arg);
1490                                 if (!cp)
1491                                         out_of_memory("parse_arguments");
1492                                 if (!*cp)
1493                                         rej = 1;
1494                                 else {
1495                                         char *dir = cp + (*cp == '/' ? module_dirlen : 0);
1496                                         clean_fname(dir, CFN_COLLAPSE_DOT_DOT_DIRS);
1497                                         rej = check_filter(&daemon_filter_list, FLOG, dir, 0) < 0;
1498                                 }
1499                                 free(cp);
1500                                 if (rej)
1501                                         goto options_rejected;
1502                         }
1503                         parse_filter_file(&filter_list, arg,
1504                                 rule_template(opt == OPT_INCLUDE_FROM ? FILTRULE_INCLUDE : 0),
1505                                 XFLG_FATAL_ERRORS | XFLG_OLD_PREFIXES);
1506                         break;
1507
1508                 case 'a':
1509                         if (refused_archive_part) {
1510                                 create_refuse_error(refused_archive_part);
1511                                 return 0;
1512                         }
1513                         if (!recurse) /* preserve recurse == 2 */
1514                                 recurse = 1;
1515 #ifdef SUPPORT_LINKS
1516                         preserve_links = 1;
1517 #endif
1518                         preserve_perms = 1;
1519                         preserve_times = 1;
1520                         preserve_gid = 1;
1521                         preserve_uid = 1;
1522                         preserve_devices = 1;
1523                         preserve_specials = 1;
1524                         break;
1525
1526                 case 'D':
1527                         preserve_devices = preserve_specials = 1;
1528                         break;
1529
1530                 case OPT_NO_D:
1531                         preserve_devices = preserve_specials = 0;
1532                         break;
1533
1534                 case 'h':
1535                         human_readable++;
1536                         break;
1537
1538                 case 'H':
1539                         preserve_hard_links++;
1540                         break;
1541
1542                 case 'i':
1543                         itemize_changes++;
1544                         break;
1545
1546                 case 'v':
1547                         verbose++;
1548                         break;
1549
1550                 case 'y':
1551                         fuzzy_basis++;
1552                         break;
1553
1554                 case 'q':
1555                         quiet++;
1556                         break;
1557
1558                 case 'x':
1559                         one_file_system++;
1560                         break;
1561
1562                 case 'F':
1563                         switch (++F_option_cnt) {
1564                         case 1:
1565                                 parse_filter_str(&filter_list,": /.rsync-filter",rule_template(0),0);
1566                                 break;
1567                         case 2:
1568                                 parse_filter_str(&filter_list,"- .rsync-filter",rule_template(0),0);
1569                                 break;
1570                         }
1571                         break;
1572
1573                 case 'P':
1574                         if (refused_partial || refused_progress) {
1575                                 create_refuse_error(refused_partial
1576                                     ? refused_partial : refused_progress);
1577                                 return 0;
1578                         }
1579                         do_progress = 1;
1580                         keep_partial = 1;
1581                         break;
1582
1583                 case 'z':
1584                         do_compression++;
1585                         break;
1586
1587                 case 'M':
1588                         arg = poptGetOptArg(pc);
1589                         if (*arg != '-') {
1590                                 snprintf(err_buf, sizeof err_buf,
1591                                         "Remote option must start with a dash: %s\n", arg);
1592                                 return 0;
1593                         }
1594                         if (remote_option_cnt+2 >= remote_option_alloc) {
1595                                 remote_option_alloc += 16;
1596                                 remote_options = realloc_array(remote_options,
1597                                                         const char *, remote_option_alloc);
1598                                 if (!remote_options)
1599                                         out_of_memory("parse_arguments");
1600                                 if (!remote_option_cnt)
1601                                         remote_options[0] = "ARG0";
1602                         }
1603                         remote_options[++remote_option_cnt] = arg;
1604                         remote_options[remote_option_cnt+1] = NULL;
1605                         break;
1606
1607                 case OPT_WRITE_BATCH:
1608                         /* batch_name is already set */
1609                         write_batch = 1;
1610                         break;
1611
1612                 case OPT_ONLY_WRITE_BATCH:
1613                         /* batch_name is already set */
1614                         write_batch = -1;
1615                         break;
1616
1617                 case OPT_READ_BATCH:
1618                         /* batch_name is already set */
1619                         read_batch = 1;
1620                         break;
1621
1622                 case OPT_NO_ICONV:
1623 #ifdef ICONV_OPTION
1624                         iconv_opt = NULL;
1625 #endif
1626                         break;
1627
1628                 case OPT_MAX_SIZE:
1629                         if ((max_size = parse_size_arg(&max_size_arg, 'b')) < 0) {
1630                                 snprintf(err_buf, sizeof err_buf,
1631                                         "--max-size value is invalid: %s\n",
1632                                         max_size_arg);
1633                                 return 0;
1634                         }
1635                         break;
1636
1637                 case OPT_MIN_SIZE:
1638                         if ((min_size = parse_size_arg(&min_size_arg, 'b')) < 0) {
1639                                 snprintf(err_buf, sizeof err_buf,
1640                                         "--min-size value is invalid: %s\n",
1641                                         min_size_arg);
1642                                 return 0;
1643                         }
1644                         break;
1645
1646                 case OPT_BWLIMIT:
1647                         {
1648                                 OFF_T limit = parse_size_arg(&bwlimit_arg, 'K');
1649                                 if (limit < 0) {
1650                                         snprintf(err_buf, sizeof err_buf,
1651                                                 "--bwlimit value is invalid: %s\n", bwlimit_arg);
1652                                         return 0;
1653                                 }
1654                                 bwlimit = (limit + 512) / 1024;
1655                                 if (limit && !bwlimit) {
1656                                         snprintf(err_buf, sizeof err_buf,
1657                                                 "--bwlimit value is too small: %s\n", bwlimit_arg);
1658                                         return 0;
1659                                 }
1660                         }
1661                         break;
1662
1663                 case OPT_APPEND:
1664                         if (am_server)
1665                                 append_mode++;
1666                         else
1667                                 append_mode = 1;
1668                         break;
1669
1670                 case OPT_LINK_DEST:
1671 #ifdef SUPPORT_HARD_LINKS
1672                         link_dest = 1;
1673                         dest_option = "--link-dest";
1674                         goto set_dest_dir;
1675 #else
1676                         snprintf(err_buf, sizeof err_buf,
1677                                  "hard links are not supported on this %s\n",
1678                                  am_server ? "server" : "client");
1679                         return 0;
1680 #endif
1681
1682                 case OPT_COPY_DEST:
1683                         copy_dest = 1;
1684                         dest_option = "--copy-dest";
1685                         goto set_dest_dir;
1686
1687                 case OPT_COMPARE_DEST:
1688                         compare_dest = 1;
1689                         dest_option = "--compare-dest";
1690                 set_dest_dir:
1691                         if (basis_dir_cnt >= MAX_BASIS_DIRS) {
1692                                 snprintf(err_buf, sizeof err_buf,
1693                                         "ERROR: at most %d %s args may be specified\n",
1694                                         MAX_BASIS_DIRS, dest_option);
1695                                 return 0;
1696                         }
1697                         /* We defer sanitizing this arg until we know what
1698                          * our destination directory is going to be. */
1699                         basis_dir[basis_dir_cnt++] = (char *)poptGetOptArg(pc);
1700                         break;
1701
1702                 case OPT_CHMOD:
1703                         arg = poptGetOptArg(pc);
1704                         if (!parse_chmod(arg, &chmod_modes)) {
1705                                 snprintf(err_buf, sizeof err_buf,
1706                                     "Invalid argument passed to --chmod (%s)\n",
1707                                     arg);
1708                                 return 0;
1709                         }
1710                         break;
1711
1712                 case OPT_INFO:
1713                         arg = poptGetOptArg(pc);
1714                         parse_output_words(info_words, info_levels, arg, USER_PRIORITY);
1715                         break;
1716
1717                 case OPT_DEBUG:
1718                         arg = poptGetOptArg(pc);
1719                         parse_output_words(debug_words, debug_levels, arg, USER_PRIORITY);
1720                         break;
1721
1722                 case OPT_USERMAP:
1723                         if (usermap) {
1724                                 if (usermap_via_chown) {
1725                                         snprintf(err_buf, sizeof err_buf,
1726                                             "--usermap conflicts with prior --chown.\n");
1727                                         return 0;
1728                                 }
1729                                 snprintf(err_buf, sizeof err_buf,
1730                                     "You can only specify --usermap once.\n");
1731                                 return 0;
1732                         }
1733                         usermap = (char *)poptGetOptArg(pc);
1734                         usermap_via_chown = False;
1735                         break;
1736
1737                 case OPT_GROUPMAP:
1738                         if (groupmap) {
1739                                 if (groupmap_via_chown) {
1740                                         snprintf(err_buf, sizeof err_buf,
1741                                             "--groupmap conflicts with prior --chown.\n");
1742                                         return 0;
1743                                 }
1744                                 snprintf(err_buf, sizeof err_buf,
1745                                     "You can only specify --groupmap once.\n");
1746                                 return 0;
1747                         }
1748                         groupmap = (char *)poptGetOptArg(pc);
1749                         groupmap_via_chown = False;
1750                         break;
1751
1752                 case OPT_CHOWN: {
1753                         const char *chown = poptGetOptArg(pc);
1754                         int len;
1755                         if ((arg = strchr(chown, ':')) != NULL)
1756                                 len = arg++ - chown;
1757                         else
1758                                 len = strlen(chown);
1759                         if (len) {
1760                                 if (usermap) {
1761                                         if (!usermap_via_chown) {
1762                                                 snprintf(err_buf, sizeof err_buf,
1763                                                     "--chown conflicts with prior --usermap.\n");
1764                                                 return 0;
1765                                         }
1766                                         snprintf(err_buf, sizeof err_buf,
1767                                             "You can only specify a user-affecting --chown once.\n");
1768                                         return 0;
1769                                 }
1770                                 if (asprintf(&usermap, "*:%.*s", len, chown) < 0)
1771                                         out_of_memory("parse_arguments");
1772                                 usermap_via_chown = True;
1773                         }
1774                         if (arg && *arg) {
1775                                 if (groupmap) {
1776                                         if (!groupmap_via_chown) {
1777                                                 snprintf(err_buf, sizeof err_buf,
1778                                                     "--chown conflicts with prior --groupmap.\n");
1779                                                 return 0;
1780                                         }
1781                                         snprintf(err_buf, sizeof err_buf,
1782                                             "You can only specify a group-affecting --chown once.\n");
1783                                         return 0;
1784                                 }
1785                                 if (asprintf(&groupmap, "*:%s", arg) < 0)
1786                                         out_of_memory("parse_arguments");
1787                                 groupmap_via_chown = True;
1788                         }
1789                         break;
1790                 }
1791
1792                 case OPT_HELP:
1793                         usage(FINFO);
1794                         exit_cleanup(0);
1795
1796                 case 'A':
1797 #ifdef SUPPORT_ACLS
1798                         preserve_acls = 1;
1799                         preserve_perms = 1;
1800                         break;
1801 #else
1802                         /* FIXME: this should probably be ignored with a
1803                          * warning and then countermeasures taken to
1804                          * restrict group and other access in the presence
1805                          * of any more restrictive ACLs, but this is safe
1806                          * for now */
1807                         snprintf(err_buf,sizeof(err_buf),
1808                                  "ACLs are not supported on this %s\n",
1809                                  am_server ? "server" : "client");
1810                         return 0;
1811 #endif
1812
1813                 case 'X':
1814 #ifdef SUPPORT_XATTRS
1815                         preserve_xattrs++;
1816                         break;
1817 #else
1818                         snprintf(err_buf,sizeof(err_buf),
1819                                  "extended attributes are not supported on this %s\n",
1820                                  am_server ? "server" : "client");
1821                         return 0;
1822 #endif
1823
1824                 default:
1825                         /* A large opt value means that set_refuse_options()
1826                          * turned this option off. */
1827                         if (opt >= OPT_REFUSED_BASE) {
1828                                 create_refuse_error(opt);
1829                                 return 0;
1830                         }
1831                         snprintf(err_buf, sizeof err_buf, "%s%s: %s\n",
1832                                  am_server ? "on remote machine: " : "",
1833                                  poptBadOption(pc, POPT_BADOPTION_NOALIAS),
1834                                  poptStrerror(opt));
1835                         return 0;
1836                 }
1837         }
1838
1839         if (protect_args < 0) {
1840                 if (am_server)
1841                         protect_args = 0;
1842                 else if ((arg = getenv("RSYNC_PROTECT_ARGS")) != NULL && *arg)
1843                         protect_args = atoi(arg) ? 1 : 0;
1844                 else {
1845 #ifdef RSYNC_USE_PROTECTED_ARGS
1846                         protect_args = 1;
1847 #else
1848                         protect_args = 0;
1849 #endif
1850                 }
1851         }
1852
1853         if (checksum_choice && strcmp(checksum_choice, "auto") != 0 && strcmp(checksum_choice, "auto,auto") != 0) {
1854                 /* Call this early to verify the args and figure out if we need to force
1855                  * --whole-file. Note that the parse function will get called again later,
1856                  * just in case an "auto" choice needs to know the protocol_version. */
1857                 if (parse_checksum_choice())
1858                         whole_file = 1;
1859         } else
1860                 checksum_choice = NULL;
1861
1862         if (human_readable > 1 && argc == 2 && !am_server) {
1863                 /* Allow the old meaning of 'h' (--help) on its own. */
1864                 usage(FINFO);
1865                 exit_cleanup(0);
1866         }
1867
1868         if (do_compression || def_compress_level != NOT_SPECIFIED) {
1869                 if (def_compress_level == NOT_SPECIFIED)
1870                         def_compress_level = Z_DEFAULT_COMPRESSION;
1871                 else if (def_compress_level < Z_DEFAULT_COMPRESSION || def_compress_level > Z_BEST_COMPRESSION) {
1872                         snprintf(err_buf, sizeof err_buf, "--compress-level value is invalid: %d\n",
1873                                  def_compress_level);
1874                         return 0;
1875                 } else if (def_compress_level == Z_NO_COMPRESSION)
1876                         do_compression = 0;
1877                 else if (!do_compression)
1878                         do_compression = 1;
1879                 if (do_compression && refused_compress) {
1880                         create_refuse_error(refused_compress);
1881                         return 0;
1882                 }
1883 #ifdef EXTERNAL_ZLIB
1884                 if (do_compression == 1) {
1885                         snprintf(err_buf, sizeof err_buf,
1886                                 "This rsync lacks old-style --compress due to its external zlib.  Try -zz.\n");
1887                         if (am_server)
1888                                 return 0;
1889                         fprintf(stderr, "%s" "Continuing without compression.\n\n", err_buf);
1890                         do_compression = 0;
1891                 }
1892 #endif
1893         }
1894
1895 #ifdef HAVE_SETVBUF
1896         if (outbuf_mode && !am_server) {
1897                 int mode = *(uchar *)outbuf_mode;
1898                 if (islower(mode))
1899                         mode = toupper(mode);
1900                 fflush(stdout); /* Just in case... */
1901                 switch (mode) {
1902                 case 'N': /* None */
1903                 case 'U': /* Unbuffered */
1904                         mode = _IONBF;
1905                         break;
1906                 case 'L': /* Line */
1907                         mode = _IOLBF;
1908                         break;
1909                 case 'B': /* Block */
1910                 case 'F': /* Full */
1911                         mode = _IOFBF;
1912                         break;
1913                 default:
1914                         snprintf(err_buf, sizeof err_buf,
1915                                 "Invalid --outbuf setting -- specify N, L, or B.\n");
1916                         return 0;
1917                 }
1918                 setvbuf(stdout, (char *)NULL, mode, 0);
1919         }
1920
1921         if (msgs2stderr) {
1922                 /* Make stderr line buffered for better sharing of the stream. */
1923                 fflush(stderr); /* Just in case... */
1924                 setvbuf(stderr, (char *)NULL, _IOLBF, 0);
1925         }
1926 #endif
1927
1928         set_output_verbosity(verbose, DEFAULT_PRIORITY);
1929
1930         if (do_stats) {
1931                 parse_output_words(info_words, info_levels,
1932                         verbose > 1 ? "stats3" : "stats2", DEFAULT_PRIORITY);
1933         }
1934
1935 #ifdef ICONV_OPTION
1936         if (iconv_opt && protect_args != 2) {
1937                 if (!am_server && strcmp(iconv_opt, "-") == 0)
1938                         iconv_opt = NULL;
1939                 else
1940                         need_unsorted_flist = 1;
1941         }
1942         if (refused_no_iconv && !iconv_opt) {
1943                 create_refuse_error(refused_no_iconv);
1944                 return 0;
1945         }
1946 #endif
1947
1948         if (fuzzy_basis > 1)
1949                 fuzzy_basis = basis_dir_cnt + 1;
1950
1951         /* Don't let the client reset protect_args if it was already processed */
1952         if (orig_protect_args == 2 && am_server)
1953                 protect_args = orig_protect_args;
1954
1955         if (protect_args == 1 && am_server)
1956                 return 1;
1957
1958         *argv_p = argv = poptGetArgs(pc);
1959         *argc_p = argc = count_args(argv);
1960
1961 #ifndef SUPPORT_LINKS
1962         if (preserve_links && !am_sender) {
1963                 snprintf(err_buf, sizeof err_buf,
1964                          "symlinks are not supported on this %s\n",
1965                          am_server ? "server" : "client");
1966                 return 0;
1967         }
1968 #endif
1969
1970 #ifndef SUPPORT_HARD_LINKS
1971         if (preserve_hard_links) {
1972                 snprintf(err_buf, sizeof err_buf,
1973                          "hard links are not supported on this %s\n",
1974                          am_server ? "server" : "client");
1975                 return 0;
1976         }
1977 #endif
1978
1979 #ifdef SUPPORT_XATTRS
1980         if (am_root < 0 && preserve_xattrs > 1) {
1981                 snprintf(err_buf, sizeof err_buf,
1982                          "--fake-super conflicts with -XX\n");
1983                 return 0;
1984         }
1985 #else
1986         if (am_root < 0) {
1987                 snprintf(err_buf, sizeof err_buf,
1988                          "--fake-super requires an rsync with extended attributes enabled\n");
1989                 return 0;
1990         }
1991 #endif
1992
1993         if (block_size) {
1994                 /* We may not know the real protocol_version at this point if this is the client
1995                  * option parsing, but we still want to check it so that the client can specify
1996                  * a --protocol=29 option with a larger block size. */
1997                 int32 max_blength = protocol_version < 30 ? OLD_MAX_BLOCK_SIZE : MAX_BLOCK_SIZE;
1998
1999                 if (block_size > max_blength) {
2000                         snprintf(err_buf, sizeof err_buf,
2001                                  "--block-size=%lu is too large (max: %u)\n", block_size, max_blength);
2002                         return 0;
2003                 }
2004         }
2005
2006         if (write_batch && read_batch) {
2007                 snprintf(err_buf, sizeof err_buf,
2008                         "--write-batch and --read-batch can not be used together\n");
2009                 return 0;
2010         }
2011         if (write_batch > 0 || read_batch) {
2012                 if (am_server) {
2013                         rprintf(FINFO,
2014                                 "ignoring --%s-batch option sent to server\n",
2015                                 write_batch ? "write" : "read");
2016                         /* We don't actually exit_cleanup(), so that we can
2017                          * still service older version clients that still send
2018                          * batch args to server. */
2019                         read_batch = write_batch = 0;
2020                         batch_name = NULL;
2021                 } else if (dry_run)
2022                         write_batch = 0;
2023         } else if (write_batch < 0 && dry_run)
2024                 write_batch = 0;
2025         if (read_batch && files_from) {
2026                 snprintf(err_buf, sizeof err_buf,
2027                         "--read-batch cannot be used with --files-from\n");
2028                 return 0;
2029         }
2030         if (read_batch && remove_source_files) {
2031                 snprintf(err_buf, sizeof err_buf,
2032                         "--read-batch cannot be used with --remove-%s-files\n",
2033                         remove_source_files == 1 ? "source" : "sent");
2034                 return 0;
2035         }
2036         if (batch_name && strlen(batch_name) > MAX_BATCH_NAME_LEN) {
2037                 snprintf(err_buf, sizeof err_buf,
2038                         "the batch-file name must be %d characters or less.\n",
2039                         MAX_BATCH_NAME_LEN);
2040                 return 0;
2041         }
2042
2043         if (tmpdir && strlen(tmpdir) >= MAXPATHLEN - 10) {
2044                 snprintf(err_buf, sizeof err_buf,
2045                          "the --temp-dir path is WAY too long.\n");
2046                 return 0;
2047         }
2048
2049         if (max_delete < 0 && max_delete != INT_MIN) {
2050                 /* Negative numbers are treated as "no deletions". */
2051                 max_delete = 0;
2052         }
2053
2054         if (compare_dest + copy_dest + link_dest > 1) {
2055                 snprintf(err_buf, sizeof err_buf,
2056                         "You may not mix --compare-dest, --copy-dest, and --link-dest.\n");
2057                 return 0;
2058         }
2059
2060         if (files_from) {
2061                 if (recurse == 1) /* preserve recurse == 2 */
2062                         recurse = 0;
2063                 if (xfer_dirs < 0)
2064                         xfer_dirs = 1;
2065         }
2066
2067         if (argc < 2 && !read_batch && !am_server)
2068                 list_only |= 1;
2069
2070         if (xfer_dirs >= 4) {
2071                 parse_filter_str(&filter_list, "- /*/*", rule_template(0), 0);
2072                 recurse = xfer_dirs = 1;
2073         } else if (recurse)
2074                 xfer_dirs = 1;
2075         else if (xfer_dirs < 0)
2076                 xfer_dirs = list_only ? 1 : 0;
2077
2078         if (relative_paths < 0)
2079                 relative_paths = files_from? 1 : 0;
2080         if (!relative_paths)
2081                 implied_dirs = 0;
2082
2083         if (delete_before + !!delete_during + delete_after > 1) {
2084                 snprintf(err_buf, sizeof err_buf,
2085                         "You may not combine multiple --delete-WHEN options.\n");
2086                 return 0;
2087         }
2088         if (delete_before || delete_during || delete_after)
2089                 delete_mode = 1;
2090         else if (delete_mode || delete_excluded) {
2091                 /* Only choose now between before & during if one is refused. */
2092                 if (refused_delete_before) {
2093                         if (!refused_delete_during)
2094                                 delete_during = 1;
2095                         else {
2096                                 create_refuse_error(refused_delete_before);
2097                                 return 0;
2098                         }
2099                 } else if (refused_delete_during)
2100                         delete_before = 1;
2101                 delete_mode = 1;
2102         }
2103         if (!xfer_dirs && delete_mode) {
2104                 snprintf(err_buf, sizeof err_buf,
2105                         "--delete does not work without --recursive (-r) or --dirs (-d).\n");
2106                 return 0;
2107         }
2108
2109         if (missing_args == 3) /* simplify if both options were specified */
2110                 missing_args = 2;
2111         if (refused_delete && (delete_mode || missing_args == 2)) {
2112                 create_refuse_error(refused_delete);
2113                 return 0;
2114         }
2115
2116         if (remove_source_files) {
2117                 /* We only want to infer this refusal of --remove-source-files
2118                  * via the refusal of "delete", not any of the "delete-FOO"
2119                  * options. */
2120                 if (refused_delete && am_sender) {
2121                         create_refuse_error(refused_delete);
2122                         return 0;
2123                 }
2124                 need_messages_from_generator = 1;
2125         }
2126
2127         if (munge_symlinks && !am_daemon) {
2128                 STRUCT_STAT st;
2129                 char prefix[SYMLINK_PREFIX_LEN]; /* NOT +1 ! */
2130                 strlcpy(prefix, SYMLINK_PREFIX, sizeof prefix); /* trim the trailing slash */
2131                 if (do_stat(prefix, &st) == 0 && S_ISDIR(st.st_mode)) {
2132                         rprintf(FERROR, "Symlink munging is unsafe when a %s directory exists.\n",
2133                                 prefix);
2134                         exit_cleanup(RERR_UNSUPPORTED);
2135                 }
2136         }
2137
2138         if (sanitize_paths) {
2139                 int i;
2140                 for (i = argc; i-- > 0; )
2141                         argv[i] = sanitize_path(NULL, argv[i], "", 0, SP_KEEP_DOT_DIRS);
2142                 if (tmpdir)
2143                         tmpdir = sanitize_path(NULL, tmpdir, NULL, 0, SP_DEFAULT);
2144                 if (backup_dir)
2145                         backup_dir = sanitize_path(NULL, backup_dir, NULL, 0, SP_DEFAULT);
2146         }
2147         if (daemon_filter_list.head && !am_sender) {
2148                 filter_rule_list *elp = &daemon_filter_list;
2149                 if (tmpdir) {
2150                         char *dir;
2151                         if (!*tmpdir)
2152                                 goto options_rejected;
2153                         dir = tmpdir + (*tmpdir == '/' ? module_dirlen : 0);
2154                         clean_fname(dir, CFN_COLLAPSE_DOT_DOT_DIRS);
2155                         if (check_filter(elp, FLOG, dir, 1) < 0)
2156                                 goto options_rejected;
2157                 }
2158                 if (backup_dir) {
2159                         char *dir;
2160                         if (!*backup_dir)
2161                                 goto options_rejected;
2162                         dir = backup_dir + (*backup_dir == '/' ? module_dirlen : 0);
2163                         clean_fname(dir, CFN_COLLAPSE_DOT_DOT_DIRS);
2164                         if (check_filter(elp, FLOG, dir, 1) < 0)
2165                                 goto options_rejected;
2166                 }
2167         }
2168
2169         if (!backup_suffix)
2170                 backup_suffix = backup_dir ? "" : BACKUP_SUFFIX;
2171         backup_suffix_len = strlen(backup_suffix);
2172         if (strchr(backup_suffix, '/') != NULL) {
2173                 snprintf(err_buf, sizeof err_buf,
2174                         "--suffix cannot contain slashes: %s\n",
2175                         backup_suffix);
2176                 return 0;
2177         }
2178         if (backup_dir) {
2179                 size_t len;
2180                 while (*backup_dir == '.' && backup_dir[1] == '/')
2181                         backup_dir += 2;
2182                 if (*backup_dir == '.' && backup_dir[1] == '\0')
2183                         backup_dir++;
2184                 len = strlcpy(backup_dir_buf, backup_dir, sizeof backup_dir_buf);
2185                 if (len > sizeof backup_dir_buf - 128) {
2186                         snprintf(err_buf, sizeof err_buf,
2187                                 "the --backup-dir path is WAY too long.\n");
2188                         return 0;
2189                 }
2190                 backup_dir_len = (int)len;
2191                 if (!backup_dir_len) {
2192                         backup_dir_len = -1;
2193                         backup_dir = NULL;
2194                 } else if (backup_dir_buf[backup_dir_len - 1] != '/') {
2195                         backup_dir_buf[backup_dir_len++] = '/';
2196                         backup_dir_buf[backup_dir_len] = '\0';
2197                 }
2198                 backup_dir_remainder = sizeof backup_dir_buf - backup_dir_len;
2199         }
2200         if (backup_dir) {
2201                 /* No need for a suffix or a protect rule. */
2202         } else if (!backup_suffix_len && (!am_server || !am_sender)) {
2203                 snprintf(err_buf, sizeof err_buf,
2204                         "--suffix cannot be empty %s\n", backup_dir_len < 0
2205                         ? "when --backup-dir is the same as the dest dir"
2206                         : "without a --backup-dir");
2207                 return 0;
2208         } else if (make_backups && delete_mode && !delete_excluded && !am_server) {
2209                 snprintf(backup_dir_buf, sizeof backup_dir_buf,
2210                         "P *%s", backup_suffix);
2211                 parse_filter_str(&filter_list, backup_dir_buf, rule_template(0), 0);
2212         }
2213
2214         if (preserve_times) {
2215                 preserve_times = PRESERVE_FILE_TIMES;
2216                 if (!omit_dir_times)
2217                         preserve_times |= PRESERVE_DIR_TIMES;
2218 #ifdef CAN_SET_SYMLINK_TIMES
2219                 if (!omit_link_times)
2220                         preserve_times |= PRESERVE_LINK_TIMES;
2221 #endif
2222         }
2223
2224         if (make_backups && !backup_dir) {
2225                 omit_dir_times = 0; /* Implied, so avoid -O to sender. */
2226                 preserve_times &= ~PRESERVE_DIR_TIMES;
2227         }
2228
2229         if (stdout_format) {
2230                 if (am_server && log_format_has(stdout_format, 'I'))
2231                         stdout_format_has_i = 2;
2232                 else if (log_format_has(stdout_format, 'i'))
2233                         stdout_format_has_i = itemize_changes | 1;
2234                 if (!log_format_has(stdout_format, 'b')
2235                  && !log_format_has(stdout_format, 'c')
2236                  && !log_format_has(stdout_format, 'C'))
2237                         log_before_transfer = !am_server;
2238         } else if (itemize_changes) {
2239                 stdout_format = "%i %n%L";
2240                 stdout_format_has_i = itemize_changes;
2241                 log_before_transfer = !am_server;
2242         }
2243
2244         if (do_progress && !am_server) {
2245                 if (!log_before_transfer && INFO_EQ(NAME, 0))
2246                         parse_output_words(info_words, info_levels, "name", DEFAULT_PRIORITY);
2247                 parse_output_words(info_words, info_levels, "flist2,progress", DEFAULT_PRIORITY);
2248         }
2249
2250         if (dry_run)
2251                 do_xfers = 0;
2252
2253         set_io_timeout(io_timeout);
2254
2255         if (INFO_GTE(NAME, 1) && !stdout_format) {
2256                 stdout_format = "%n%L";
2257                 log_before_transfer = !am_server;
2258         }
2259         if (stdout_format_has_i || log_format_has(stdout_format, 'o'))
2260                 stdout_format_has_o_or_i = 1;
2261
2262         if (logfile_name && !am_daemon) {
2263                 if (!logfile_format) {
2264                         logfile_format = "%i %n%L";
2265                         logfile_format_has_i = logfile_format_has_o_or_i = 1;
2266                 } else {
2267                         if (log_format_has(logfile_format, 'i'))
2268                                 logfile_format_has_i = 1;
2269                         if (logfile_format_has_i || log_format_has(logfile_format, 'o'))
2270                                 logfile_format_has_o_or_i = 1;
2271                 }
2272                 log_init(0);
2273         } else if (!am_daemon)
2274                 logfile_format = NULL;
2275
2276         if (daemon_bwlimit && (!bwlimit || bwlimit > daemon_bwlimit))
2277                 bwlimit = daemon_bwlimit;
2278         if (bwlimit) {
2279                 bwlimit_writemax = (size_t)bwlimit * 128;
2280                 if (bwlimit_writemax < 512)
2281                         bwlimit_writemax = 512;
2282         }
2283
2284         if (append_mode) {
2285                 if (whole_file > 0) {
2286                         snprintf(err_buf, sizeof err_buf,
2287                                  "--append cannot be used with --whole-file\n");
2288                         return 0;
2289                 }
2290                 if (refused_inplace) {
2291                         create_refuse_error(refused_inplace);
2292                         return 0;
2293                 }
2294                 inplace = 1;
2295         }
2296
2297         if (write_devices) {
2298                 if (refused_inplace) {
2299                         create_refuse_error(refused_inplace);
2300                         return 0;
2301                 }
2302                 inplace = 1;
2303         }
2304
2305         if (delay_updates && !partial_dir)
2306                 partial_dir = tmp_partialdir;
2307
2308         if (inplace) {
2309 #ifdef HAVE_FTRUNCATE
2310                 if (partial_dir) {
2311                         snprintf(err_buf, sizeof err_buf,
2312                                  "--%s cannot be used with --%s\n",
2313                                  append_mode ? "append" : "inplace",
2314                                  delay_updates ? "delay-updates" : "partial-dir");
2315                         return 0;
2316                 }
2317                 /* --inplace implies --partial for refusal purposes, but we
2318                  * clear the keep_partial flag for internal logic purposes. */
2319                 if (refused_partial) {
2320                         create_refuse_error(refused_partial);
2321                         return 0;
2322                 }
2323                 keep_partial = 0;
2324 #else
2325                 snprintf(err_buf, sizeof err_buf,
2326                          "--%s is not supported on this %s\n",
2327                          append_mode ? "append" : "inplace",
2328                          am_server ? "server" : "client");
2329                 return 0;
2330 #endif
2331         } else {
2332                 if (keep_partial && !partial_dir && !am_server) {
2333                         if ((arg = getenv("RSYNC_PARTIAL_DIR")) != NULL && *arg)
2334                                 partial_dir = strdup(arg);
2335                 }
2336                 if (partial_dir) {
2337                         if (*partial_dir)
2338                                 clean_fname(partial_dir, CFN_COLLAPSE_DOT_DOT_DIRS);
2339                         if (!*partial_dir || strcmp(partial_dir, ".") == 0)
2340                                 partial_dir = NULL;
2341                         if (!partial_dir && refused_partial) {
2342                                 create_refuse_error(refused_partial);
2343                                 return 0;
2344                         }
2345                         keep_partial = 1;
2346                 }
2347         }
2348
2349         if (files_from) {
2350                 char *h, *p;
2351                 int q;
2352                 if (argc > 2 || (!am_daemon && !am_server && argc == 1)) {
2353                         usage(FERROR);
2354                         exit_cleanup(RERR_SYNTAX);
2355                 }
2356                 if (strcmp(files_from, "-") == 0) {
2357                         filesfrom_fd = 0;
2358                         if (am_server)
2359                                 filesfrom_host = ""; /* reading from socket */
2360                 } else if ((p = check_for_hostspec(files_from, &h, &q)) != 0) {
2361                         if (am_server) {
2362                                 snprintf(err_buf, sizeof err_buf,
2363                                         "The --files-from sent to the server cannot specify a host.\n");
2364                                 return 0;
2365                         }
2366                         files_from = p;
2367                         filesfrom_host = h;
2368                         if (strcmp(files_from, "-") == 0) {
2369                                 snprintf(err_buf, sizeof err_buf,
2370                                         "Invalid --files-from remote filename\n");
2371                                 return 0;
2372                         }
2373                 } else {
2374                         if (sanitize_paths)
2375                                 files_from = sanitize_path(NULL, files_from, NULL, 0, SP_DEFAULT);
2376                         if (daemon_filter_list.head) {
2377                                 char *dir;
2378                                 if (!*files_from)
2379                                         goto options_rejected;
2380                                 dir = files_from + (*files_from == '/' ? module_dirlen : 0);
2381                                 clean_fname(dir, CFN_COLLAPSE_DOT_DOT_DIRS);
2382                                 if (check_filter(&daemon_filter_list, FLOG, dir, 0) < 0)
2383                                         goto options_rejected;
2384                         }
2385                         filesfrom_fd = open(files_from, O_RDONLY|O_BINARY);
2386                         if (filesfrom_fd < 0) {
2387                                 snprintf(err_buf, sizeof err_buf,
2388                                         "failed to open files-from file %s: %s\n",
2389                                         files_from, strerror(errno));
2390                                 return 0;
2391                         }
2392                 }
2393         }
2394
2395         am_starting_up = 0;
2396
2397         return 1;
2398
2399   options_rejected:
2400         snprintf(err_buf, sizeof err_buf,
2401                 "Your options have been rejected by the server.\n");
2402         return 0;
2403 }
2404
2405
2406 /**
2407  * Construct a filtered list of options to pass through from the
2408  * client to the server.
2409  *
2410  * This involves setting options that will tell the server how to
2411  * behave, and also filtering out options that are processed only
2412  * locally.
2413  **/
2414 void server_options(char **args, int *argc_p)
2415 {
2416         static char argstr[64];
2417         int ac = *argc_p;
2418         uchar where;
2419         char *arg;
2420         int i, x;
2421
2422         /* This should always remain first on the server's command-line. */
2423         args[ac++] = "--server";
2424
2425         if (daemon_over_rsh > 0) {
2426                 args[ac++] = "--daemon";
2427                 *argc_p = ac;
2428                 /* if we're passing --daemon, we're done */
2429                 return;
2430         }
2431
2432         if (!am_sender)
2433                 args[ac++] = "--sender";
2434
2435         x = 1;
2436         argstr[0] = '-';
2437
2438         if (protect_args)
2439                 argstr[x++] = 's';
2440
2441         for (i = 0; i < verbose; i++)
2442                 argstr[x++] = 'v';
2443
2444         /* the -q option is intentionally left out */
2445         if (make_backups)
2446                 argstr[x++] = 'b';
2447         if (update_only)
2448                 argstr[x++] = 'u';
2449         if (!do_xfers) /* Note: NOT "dry_run"! */
2450                 argstr[x++] = 'n';
2451         if (preserve_links)
2452                 argstr[x++] = 'l';
2453         if ((xfer_dirs >= 2 && xfer_dirs < 4)
2454          || (xfer_dirs && !recurse && (list_only || (delete_mode && am_sender))))
2455                 argstr[x++] = 'd';
2456         if (am_sender) {
2457                 if (keep_dirlinks)
2458                         argstr[x++] = 'K';
2459                 if (prune_empty_dirs)
2460                         argstr[x++] = 'm';
2461                 if (omit_dir_times)
2462                         argstr[x++] = 'O';
2463                 if (omit_link_times)
2464                         argstr[x++] = 'J';
2465                 if (fuzzy_basis) {
2466                         argstr[x++] = 'y';
2467                         if (fuzzy_basis > 1)
2468                                 argstr[x++] = 'y';
2469                 }
2470         } else {
2471                 if (copy_links)
2472                         argstr[x++] = 'L';
2473                 if (copy_dirlinks)
2474                         argstr[x++] = 'k';
2475         }
2476
2477         if (whole_file > 0)
2478                 argstr[x++] = 'W';
2479         /* We don't need to send --no-whole-file, because it's the
2480          * default for remote transfers, and in any case old versions
2481          * of rsync will not understand it. */
2482
2483         if (preserve_hard_links) {
2484                 argstr[x++] = 'H';
2485                 if (preserve_hard_links > 1)
2486                         argstr[x++] = 'H';
2487         }
2488         if (preserve_uid)
2489                 argstr[x++] = 'o';
2490         if (preserve_gid)
2491                 argstr[x++] = 'g';
2492         if (preserve_devices) /* ignore preserve_specials here */
2493                 argstr[x++] = 'D';
2494         if (preserve_times)
2495                 argstr[x++] = 't';
2496         if (preserve_perms)
2497                 argstr[x++] = 'p';
2498         else if (preserve_executability && am_sender)
2499                 argstr[x++] = 'E';
2500 #ifdef SUPPORT_ACLS
2501         if (preserve_acls)
2502                 argstr[x++] = 'A';
2503 #endif
2504 #ifdef SUPPORT_XATTRS
2505         if (preserve_xattrs) {
2506                 argstr[x++] = 'X';
2507                 if (preserve_xattrs > 1)
2508                         argstr[x++] = 'X';
2509         }
2510 #endif
2511         if (recurse)
2512                 argstr[x++] = 'r';
2513         if (always_checksum)
2514                 argstr[x++] = 'c';
2515         if (cvs_exclude)
2516                 argstr[x++] = 'C';
2517         if (ignore_times)
2518                 argstr[x++] = 'I';
2519         if (relative_paths)
2520                 argstr[x++] = 'R';
2521         if (one_file_system) {
2522                 argstr[x++] = 'x';
2523                 if (one_file_system > 1)
2524                         argstr[x++] = 'x';
2525         }
2526         if (sparse_files)
2527                 argstr[x++] = 'S';
2528         if (do_compression == 1)
2529                 argstr[x++] = 'z';
2530
2531         set_allow_inc_recurse();
2532
2533         /* We don't really know the actual protocol_version at this point,
2534          * but checking the pre-negotiated value allows the user to use a
2535          * --protocol=29 override to avoid the use of this -eFLAGS opt. */
2536         if (protocol_version >= 30) {
2537                 /* Use "eFlags" alias so that cull_options doesn't think that these are no-arg option letters. */
2538 #define eFlags argstr
2539                 /* We make use of the -e option to let the server know about
2540                  * any pre-release protocol version && some behavior flags. */
2541                 eFlags[x++] = 'e';
2542 #if SUBPROTOCOL_VERSION != 0
2543                 if (protocol_version == PROTOCOL_VERSION) {
2544                         x += snprintf(argstr+x, sizeof argstr - x,
2545                                       "%d.%d",
2546                                       PROTOCOL_VERSION, SUBPROTOCOL_VERSION);
2547                 } else
2548 #endif
2549                         eFlags[x++] = '.';
2550                 if (allow_inc_recurse)
2551                         eFlags[x++] = 'i';
2552 #ifdef CAN_SET_SYMLINK_TIMES
2553                 eFlags[x++] = 'L'; /* symlink time-setting support */
2554 #endif
2555 #ifdef ICONV_OPTION
2556                 eFlags[x++] = 's'; /* symlink iconv translation support */
2557 #endif
2558                 eFlags[x++] = 'f'; /* flist I/O-error safety support */
2559                 eFlags[x++] = 'x'; /* xattr hardlink optimization not desired */
2560                 eFlags[x++] = 'C'; /* support checksum seed order fix */
2561 #undef eFlags
2562         }
2563
2564         if (x >= (int)sizeof argstr) { /* Not possible... */
2565                 rprintf(FERROR, "argstr overflow in server_options().\n");
2566                 exit_cleanup(RERR_MALLOC);
2567         }
2568
2569         argstr[x] = '\0';
2570
2571         if (x > 1)
2572                 args[ac++] = argstr;
2573
2574 #ifdef ICONV_OPTION
2575         if (iconv_opt) {
2576                 char *set = strchr(iconv_opt, ',');
2577                 if (set)
2578                         set++;
2579                 else
2580                         set = iconv_opt;
2581                 if (asprintf(&arg, "--iconv=%s", set) < 0)
2582                         goto oom;
2583                 args[ac++] = arg;
2584         }
2585 #endif
2586
2587         if (protect_args && !local_server) /* unprotected args stop here */
2588                 args[ac++] = NULL;
2589
2590         if (list_only > 1)
2591                 args[ac++] = "--list-only";
2592
2593         /* This makes sure that the remote rsync can handle deleting with -d
2594          * sans -r because the --no-r option was added at the same time. */
2595         if (xfer_dirs && !recurse && delete_mode && am_sender)
2596                 args[ac++] = "--no-r";
2597
2598         if (do_compression && def_compress_level != Z_DEFAULT_COMPRESSION) {
2599                 if (asprintf(&arg, "--compress-level=%d", def_compress_level) < 0)
2600                         goto oom;
2601                 args[ac++] = arg;
2602         }
2603
2604         if (preserve_devices) {
2605                 /* Note: sending "--devices" would not be backward-compatible. */
2606                 if (!preserve_specials)
2607                         args[ac++] = "--no-specials"; /* -D is already set. */
2608         } else if (preserve_specials)
2609                 args[ac++] = "--specials";
2610
2611         /* The server side doesn't use our log-format, but in certain
2612          * circumstances they need to know a little about the option. */
2613         if (stdout_format && am_sender) {
2614                 /* Use --log-format, not --out-format, for compatibility. */
2615                 if (stdout_format_has_i > 1)
2616                         args[ac++] = "--log-format=%i%I";
2617                 else if (stdout_format_has_i)
2618                         args[ac++] = "--log-format=%i";
2619                 else if (stdout_format_has_o_or_i)
2620                         args[ac++] = "--log-format=%o";
2621                 else if (!verbose)
2622                         args[ac++] = "--log-format=X";
2623         }
2624
2625         if (block_size) {
2626                 if (asprintf(&arg, "-B%lu", block_size) < 0)
2627                         goto oom;
2628                 args[ac++] = arg;
2629         }
2630
2631         if (io_timeout) {
2632                 if (asprintf(&arg, "--timeout=%d", io_timeout) < 0)
2633                         goto oom;
2634                 args[ac++] = arg;
2635         }
2636
2637         if (bwlimit) {
2638                 if (asprintf(&arg, "--bwlimit=%d", bwlimit) < 0)
2639                         goto oom;
2640                 args[ac++] = arg;
2641         }
2642
2643         if (backup_dir) {
2644                 args[ac++] = "--backup-dir";
2645                 args[ac++] = backup_dir;
2646         }
2647
2648         /* Only send --suffix if it specifies a non-default value. */
2649         if (strcmp(backup_suffix, backup_dir ? "" : BACKUP_SUFFIX) != 0) {
2650                 /* We use the following syntax to avoid weirdness with '~'. */
2651                 if (asprintf(&arg, "--suffix=%s", backup_suffix) < 0)
2652                         goto oom;
2653                 args[ac++] = arg;
2654         }
2655
2656         if (checksum_choice) {
2657                 if (asprintf(&arg, "--checksum-choice=%s", checksum_choice) < 0)
2658                         goto oom;
2659                 args[ac++] = arg;
2660         }
2661
2662         if (am_sender) {
2663                 if (max_delete > 0) {
2664                         if (asprintf(&arg, "--max-delete=%d", max_delete) < 0)
2665                                 goto oom;
2666                         args[ac++] = arg;
2667                 } else if (max_delete == 0)
2668                         args[ac++] = "--max-delete=-1";
2669                 if (min_size >= 0) {
2670                         args[ac++] = "--min-size";
2671                         args[ac++] = min_size_arg;
2672                 }
2673                 if (max_size >= 0) {
2674                         args[ac++] = "--max-size";
2675                         args[ac++] = max_size_arg;
2676                 }
2677                 if (delete_before)
2678                         args[ac++] = "--delete-before";
2679                 else if (delete_during == 2)
2680                         args[ac++] = "--delete-delay";
2681                 else if (delete_during)
2682                         args[ac++] = "--delete-during";
2683                 else if (delete_after)
2684                         args[ac++] = "--delete-after";
2685                 else if (delete_mode && !delete_excluded)
2686                         args[ac++] = "--delete";
2687                 if (delete_excluded)
2688                         args[ac++] = "--delete-excluded";
2689                 if (force_delete)
2690                         args[ac++] = "--force";
2691                 if (write_batch < 0)
2692                         args[ac++] = "--only-write-batch=X";
2693                 if (am_root > 1)
2694                         args[ac++] = "--super";
2695                 if (size_only)
2696                         args[ac++] = "--size-only";
2697                 if (do_stats)
2698                         args[ac++] = "--stats";
2699         } else {
2700                 if (skip_compress) {
2701                         if (asprintf(&arg, "--skip-compress=%s", skip_compress) < 0)
2702                                 goto oom;
2703                         args[ac++] = arg;
2704                 }
2705         }
2706
2707         /* --delete-missing-args needs the cooperation of both sides, but
2708          * the sender can handle --ignore-missing-args by itself. */
2709         if (missing_args == 2)
2710                 args[ac++] = "--delete-missing-args";
2711         else if (missing_args == 1 && !am_sender)
2712                 args[ac++] = "--ignore-missing-args";
2713
2714         if (modify_window_set && am_sender) {
2715                 char *fmt = modify_window < 0 ? "-@%d" : "--modify-window=%d";
2716                 if (asprintf(&arg, fmt, modify_window) < 0)
2717                         goto oom;
2718                 args[ac++] = arg;
2719         }
2720
2721         if (checksum_seed) {
2722                 if (asprintf(&arg, "--checksum-seed=%d", checksum_seed) < 0)
2723                         goto oom;
2724                 args[ac++] = arg;
2725         }
2726
2727         if (partial_dir && am_sender) {
2728                 if (partial_dir != tmp_partialdir) {
2729                         args[ac++] = "--partial-dir";
2730                         args[ac++] = partial_dir;
2731                 }
2732                 if (delay_updates)
2733                         args[ac++] = "--delay-updates";
2734         } else if (keep_partial && am_sender)
2735                 args[ac++] = "--partial";
2736
2737         if (ignore_errors)
2738                 args[ac++] = "--ignore-errors";
2739
2740         if (copy_unsafe_links)
2741                 args[ac++] = "--copy-unsafe-links";
2742
2743         if (safe_symlinks)
2744                 args[ac++] = "--safe-links";
2745
2746         if (numeric_ids)
2747                 args[ac++] = "--numeric-ids";
2748
2749         if (use_qsort)
2750                 args[ac++] = "--use-qsort";
2751
2752         if (am_sender) {
2753                 if (usermap) {
2754                         if (asprintf(&arg, "--usermap=%s", usermap) < 0)
2755                                 goto oom;
2756                         args[ac++] = arg;
2757                 }
2758
2759                 if (groupmap) {
2760                         if (asprintf(&arg, "--groupmap=%s", groupmap) < 0)
2761                                 goto oom;
2762                         args[ac++] = arg;
2763                 }
2764
2765                 if (ignore_existing)
2766                         args[ac++] = "--ignore-existing";
2767
2768                 /* Backward compatibility: send --existing, not --ignore-non-existing. */
2769                 if (ignore_non_existing)
2770                         args[ac++] = "--existing";
2771
2772                 if (tmpdir) {
2773                         args[ac++] = "--temp-dir";
2774                         args[ac++] = tmpdir;
2775                 }
2776
2777                 if (basis_dir[0]) {
2778                         /* the server only needs this option if it is not the sender,
2779                          *   and it may be an older version that doesn't know this
2780                          *   option, so don't send it if client is the sender.
2781                          */
2782                         for (i = 0; i < basis_dir_cnt; i++) {
2783                                 args[ac++] = dest_option;
2784                                 args[ac++] = basis_dir[i];
2785                         }
2786                 }
2787         }
2788
2789         /* What flags do we need to send to the other side? */
2790         where = (am_server ? W_CLI : W_SRV) | (am_sender ? W_REC : W_SND);
2791         arg = make_output_option(info_words, info_levels, where);
2792         if (arg)
2793                 args[ac++] = arg;
2794
2795         arg = make_output_option(debug_words, debug_levels, where);
2796         if (arg)
2797                 args[ac++] = arg;
2798
2799         if (append_mode) {
2800                 if (append_mode > 1)
2801                         args[ac++] = "--append";
2802                 args[ac++] = "--append";
2803         } else if (inplace)
2804                 args[ac++] = "--inplace";
2805
2806         if (files_from && (!am_sender || filesfrom_host)) {
2807                 if (filesfrom_host) {
2808                         args[ac++] = "--files-from";
2809                         args[ac++] = files_from;
2810                         if (eol_nulls)
2811                                 args[ac++] = "--from0";
2812                 } else {
2813                         args[ac++] = "--files-from=-";
2814                         args[ac++] = "--from0";
2815                 }
2816                 if (!relative_paths)
2817                         args[ac++] = "--no-relative";
2818         }
2819         /* It's OK that this checks the upper-bound of the protocol_version. */
2820         if (relative_paths && !implied_dirs && (!am_sender || protocol_version >= 30))
2821                 args[ac++] = "--no-implied-dirs";
2822
2823         if (write_devices && am_sender)
2824                 args[ac++] = "--write-devices";
2825
2826         if (remove_source_files == 1)
2827                 args[ac++] = "--remove-source-files";
2828         else if (remove_source_files)
2829                 args[ac++] = "--remove-sent-files";
2830
2831         if (preallocate_files && am_sender)
2832                 args[ac++] = "--preallocate";
2833
2834         if (ac > MAX_SERVER_ARGS) { /* Not possible... */
2835                 rprintf(FERROR, "argc overflow in server_options().\n");
2836                 exit_cleanup(RERR_MALLOC);
2837         }
2838
2839         if (do_compression > 1)
2840                 args[ac++] = "--new-compress";
2841
2842         if (remote_option_cnt) {
2843                 int j;
2844                 if (ac + remote_option_cnt > MAX_SERVER_ARGS) {
2845                         rprintf(FERROR, "too many remote options specified.\n");
2846                         exit_cleanup(RERR_SYNTAX);
2847                 }
2848                 for (j = 1; j <= remote_option_cnt; j++)
2849                         args[ac++] = (char*)remote_options[j];
2850         }
2851
2852         *argc_p = ac;
2853         return;
2854
2855     oom:
2856         out_of_memory("server_options");
2857 }
2858
2859 /* If str points to a valid hostspec, return allocated memory containing the
2860  * [USER@]HOST part of the string, and set the path_start_ptr to the part of
2861  * the string after the host part.  Otherwise, return NULL.  If port_ptr is
2862  * non-NULL, we must be parsing an rsync:// URL hostname, and we will set
2863  * *port_ptr if a port number is found.  Note that IPv6 IPs will have their
2864  * (required for parsing) [ and ] chars elided from the returned string. */
2865 static char *parse_hostspec(char *str, char **path_start_ptr, int *port_ptr)
2866 {
2867         char *s, *host_start = str;
2868         int hostlen = 0, userlen = 0;
2869         char *ret;
2870
2871         for (s = str; ; s++) {
2872                 if (!*s) {
2873                         /* It is only OK if we run out of string with rsync:// */
2874                         if (!port_ptr)
2875                                 return NULL;
2876                         if (!hostlen)
2877                                 hostlen = s - host_start;
2878                         break;
2879                 }
2880                 if (*s == ':' || *s == '/') {
2881                         if (!hostlen)
2882                                 hostlen = s - host_start;
2883                         if (*s++ == '/') {
2884                                 if (!port_ptr)
2885                                         return NULL;
2886                         } else if (port_ptr) {
2887                                 *port_ptr = atoi(s);
2888                                 while (isDigit(s)) s++;
2889                                 if (*s && *s++ != '/')
2890                                         return NULL;
2891                         }
2892                         break;
2893                 }
2894                 if (*s == '@') {
2895                         userlen = s - str + 1;
2896                         host_start = s + 1;
2897                 } else if (*s == '[') {
2898                         if (s != host_start++)
2899                                 return NULL;
2900                         while (*s && *s != ']' && *s != '/') s++; /*SHARED ITERATOR*/
2901                         hostlen = s - host_start;
2902                         if (*s != ']' || (s[1] && s[1] != '/' && s[1] != ':') || !hostlen)
2903                                 return NULL;
2904                 }
2905         }
2906
2907         *path_start_ptr = s;
2908         ret = new_array(char, userlen + hostlen + 1);
2909         if (userlen)
2910                 strlcpy(ret, str, userlen + 1);
2911         strlcpy(ret + userlen, host_start, hostlen + 1);
2912         return ret;
2913 }
2914
2915 /* Look for a HOST specfication of the form "HOST:PATH", "HOST::PATH", or
2916  * "rsync://HOST:PORT/PATH".  If found, *host_ptr will be set to some allocated
2917  * memory with the HOST.  If a daemon-accessing spec was specified, the value
2918  * of *port_ptr will contain a non-0 port number, otherwise it will be set to
2919  * 0.  The return value is a pointer to the PATH.  Note that the HOST spec can
2920  * be an IPv6 literal address enclosed in '[' and ']' (such as "[::1]" or
2921  * "[::ffff:127.0.0.1]") which is returned without the '[' and ']'. */
2922 char *check_for_hostspec(char *s, char **host_ptr, int *port_ptr)
2923 {
2924         char *path;
2925
2926         if (port_ptr && strncasecmp(URL_PREFIX, s, strlen(URL_PREFIX)) == 0) {
2927                 *host_ptr = parse_hostspec(s + strlen(URL_PREFIX), &path, port_ptr);
2928                 if (*host_ptr) {
2929                         if (!*port_ptr)
2930                                 *port_ptr = -1; /* -1 indicates they want the default */
2931                         return path;
2932                 }
2933         }
2934
2935         *host_ptr = parse_hostspec(s, &path, NULL);
2936         if (!*host_ptr)
2937                 return NULL;
2938
2939         if (*path == ':') {
2940                 if (port_ptr && !*port_ptr)
2941                         *port_ptr = -1;
2942                 return path + 1;
2943         }
2944         if (port_ptr)
2945                 *port_ptr = 0;
2946
2947         return path;
2948 }